The Creedmoor Forum

Creedmoor Technical Info => Wildcats => Topic started by: mnbogboy on March 14, 2021, 09:05:47 PM

Title: Some Creedmoor varients
Post by: mnbogboy on March 14, 2021, 09:05:47 PM
My right hand womean forbid me to go out & shoot these today per doctors orders (no shooting).  Id rather not breath if thats allowed. Had the mag speed already strapped to the barrel.  In this mix are a few factory 308.  I chambered this using a 308 hs gauge and hopefully a crush fit as an Ackley imp.
Very cirious to ee the velocitys of the 243 cased 243 100 gr. b  ullets amd compare them to known 6mm creeds
Also the 25 calibet version is loaded with 95 grain bullets.
I also loaded some 708 cases with 120 gr vmax
The 30tc vetsion is loaded with 150 fmjs
All loads are 40 grains of H335 that stuff meters very eady. After forgetting to prime a couple of cases the whole charge ran out the flash hole.  Making a mess in the cartridge block.
My hospital stay had me dreaming up this trial almost everyday. Convertinh the brass all to 6.5 creed makes it fit ok in the 30tc chamber
I do have sme loaded 6.5 creed ammo & 243 that i may try also.  Hoping that after i get it boresighted thar i can print 3 or 4 groups on the same target.
Call me crazy because i feel crazy woth this one.
I ended up shoryening the barrel to 19.75 inches and put a QCB brake on it.
Title: Re: Some Creedmoor varients
Post by: DHuffman on March 14, 2021, 09:47:31 PM
When fire forming from x47L to improved recently I was beginning to regret not having the barrel threaded for a brake. The recoil on the slick bags would get your attention.  My friend caught the scope across the nose and drew a little blood.

I was FF with 40g h4350 behind a 133 but now with a formed case 40.8 has much less recoil and it's easy to free recoil it and "catch" the gun when it breaks the grip on the bags.
Hadn't noticed it before and found it interesting.
Title: Re: Some Creedmoor varients
Post by: mnbogboy on March 15, 2021, 05:49:53 PM
Firdt day back to my bench. Tried to chamber first round pulled it out a slight swishing sound (loose powder flowing. Another trip yo the house to get a ram rod.  Try putting on muffs with only one hand.
Could not bore sight because i couldnt see all the way througj the brake.  Maybe the ports wre causing shadows? Have an appointment with opthamologist in a couple weeks to determine the damage/ stroke effects to my left eye. Truly today wasa lesson in futility.  Wife was dead set against me tryingshe said doctor said no driving no firesrms (liberal) no alcohol no shed hunting whicj is next on my slateno power tools guess building a nother house is out. If i cant shoot or walk in the woods what can i do?
Title: Re: Some Creedmoor varients
Post by: gman47564 on March 15, 2021, 06:18:27 PM
Chase the wife around the house...???? give it time randy.. listen to the doc's.. it will get better.. hang in there..
Title: Re: Some Creedmoor varients
Post by: mnbogboy on March 15, 2021, 07:09:53 PM
Quote from: gman47564 on March 15, 2021, 06:18:27 PMChase the wife around the house...???? give it time randy.. listen to the doc's.. it will get better.. hang in there..
my chase around the house days left me asa younger man digging out old Merle Haggard sonhs as we speak
Title: Re: Some Creedmoor varients
Post by: jvw2008 on March 15, 2021, 07:59:10 PM
Keep experimenting Randy. You will find new ways to do the things that give you satisfaction. You just have to be willing to adapt along the way.
Title: Re: Some Creedmoor varients
Post by: mnbogboy on March 22, 2021, 09:17:27 PM
Still struggling with this monster. A day at the doctors & opthamologist.  My left hand was swollen up including all the fingers due to traumatic nerve damage from the stroke. The doctor cut my wedding ring off with a couple of different ring cutters. Not real pleasant especially with sore joints. Not sure if the swelling wasnt related to the covid vaccination i had last week in the left arm.  Eye foc said all looked ok but today again i couldnt see well enough to bore sight the new barrel.  Wanted to get some velocities of the assorted ammo i made up. Lots of ftf mayne due to repurposed primers & powder. Thinking it could be a bolt problem but havent tore it down uet.
Click was the norm no primer dents.  I need my baclordered rcbs puller colleyts to show up from uncle larry so i can pull these assorted cartridges apart.  244 257 6.5 7mm & 308 to pull down. All the cases i made fit and chambered easily including the factory 308 that one of my sons brought me a couple of weeks ahao. Curious to see how good the brake worked as a 308.  6.5 creed 243 257 creed and 708 all fit nicely.also 360 &308 fit easily also. Kind of a hassle sizing everything to fit the chamber and also hold the desired bullets.
Title: Re: Some Creedmoor varients
Post by: DHuffman on March 22, 2021, 09:48:35 PM
Keep plugging away Randy, it has to get better.
Title: Re: Some Creedmoor varients
Post by: mnbogboy on March 23, 2021, 02:36:11 PM
After boresighting i tried to push the bolt back in with my mouth while my right hand was running tje trigger & bolt stop998u glad it was nt 30 below again or my lips may have welded themselves to the bolt knob. Lol
Title: Re: Some Creedmoor varients
Post by: Ranger 188 on March 23, 2021, 03:17:41 PM
Damn, you really want to shoot!
That Minnesota can do attitude.
Title: Re: Some Creedmoor varients
Post by: mnbogboy on March 23, 2021, 09:59:07 PM
Bolt. Apart...some of the loose powder (fine grained H335 had the firing pin all gummed up. Must have dumped on the bolt head when the gun was stood up in the safe. Ehen the bullet pulled a few days ago the powder poured into the magazine.  Its so fine it runs out of a flash hole if a primer is forgotten...syroke complications on memory...did it twice.  The fine powder may have found its way down the bolt head also. And slowed the p@in fall. My diagnosis.
Title: Re: Some Creedmoor varients
Post by: DHuffman on March 29, 2021, 02:31:58 PM
In my 6.5Stabal experience I've encountered a lot of this.
It's a very fine cut ball powder and is a mess to deal with if not properly handled.
Title: Re: Some Creedmoor varients
Post by: mnbogboy on April 01, 2021, 03:55:43 PM
A trip out to the bench today again ended up in failure.
More ftfs still anxious to see if i can fire all these different carts in the same chamber. 308 708 260 and 6.5 creed also the 6 creed & 25 creed.
Todays ftf were not related to the bolt as last weeks were. A trip back into shop with@a quick bolt rear down.  Alsoi brought some primed cases out with me to test the strike but no luck with them. Next trip hopefully i will get tge numbers@im looking for.
Those velocities may determine what i build next! Im thinking a 10 twist 25 creed. 2 10twist barrels@on tge@shelf.
Title: Re: Some Creedmoor varients
Post by: DHuffman on April 01, 2021, 09:33:20 PM
Quote from: mnbogboy on April 01, 2021, 03:55:43 PMA trip out to the bench today again ended up in failure.
More ftfs still anxious to see if i can fire all these different carts in the same chamber. 308 708 260 and 6.5 creed also the 6 creed & 25 creed.
Todays ftf were not related to the bolt as last weeks were. A trip back into shop with@a quick bolt rear down.  Alsoi brought some primed cases out with me to test the strike but no luck with them. Next trip hopefully i will get tge numbers@im looking for.
Those velocities may determine what i build next! Im thinking a 10 twist 25 creed. 2 10twist barrels@on tge@shelf.

You've definitely got me curious and confused ????

Am I understanding correctly that you have wildcat reamed a 6, 25, 6.5, 7 & 30 cal barrels to make a creedmoor variant of each and are trying to basically AI ff them from other brass off a shoulder crush?

Title: Re: Some Creedmoor varients
Post by: mnbogboy on April 01, 2021, 10:02:06 PM
Quote from: HufD63 on April 01, 2021, 09:33:20 PMYou've definitely got me curious and confused ????

Am I understanding correctly that you have wildcat reamed a 6, 25, 6.5, 7 & 30 cal barrels to make a creedmoor variant of each and are trying to basically AI ff them from other brass off a shoulder crush?


no, just a 30 cal barrel that will accept all the other brsds mentioned. The smaller bulletswill rattle down the bore.
Title: Re: Some Creedmoor varients
Post by: DHuffman on April 01, 2021, 10:30:33 PM
Quote from: mnbogboy on April 01, 2021, 10:02:06 PMno, just a 30 cal barrel that will accept all the other brsds mentioned. The smaller bulletswill rattle down the bore.

So now I gotta ask "why"? That surely can't do the bore any good....

Sorry I'm not more up to speed on this I've been preoccupied trying to get my, match guns running LOL
Title: Re: Some Creedmoor varients
Post by: mnbogboy on April 02, 2021, 12:25:35 PM
Dont know why buti will never know until i try.  This will solve the ammo shortage  and make a place for all the brass in the scrap box.
Title: Re: Some Creedmoor varients
Post by: jvw2008 on April 02, 2021, 12:46:10 PM
Have you thought about doing fire forming with cream of wheat? Might be safer than putting small Bullets down a larger bore and would save components.
Title: Re: Some Creedmoor varients
Post by: mnbogboy on April 02, 2021, 03:27:41 PM
What can i expect from small bullets in the larger bore other than accelerated throat erosion?
Title: Re: Some Creedmoor varients
Post by: jvw2008 on April 02, 2021, 06:23:25 PM
Quote from: mnbogboy on April 02, 2021, 03:27:41 PMWhat can i expect from small bullets in the larger bore other than accelerated throat erosion?

Well Randy I don't know. I've never had occasion to do that. I would be a little concerned about what a small bullet might do to the rifling as it rattles its way down the bore. Dropping from a 308 bore to a 257 bullet is quite a difference. I think there is a potential for the bullet to shred and then lead to debris accumulating in the barrel causing a catastrophic pressure spike.

Like I said, I have no experience there and not read of anyone else doing that. Be safe my friend.
Title: Re: Some Creedmoor varients
Post by: gman47564 on April 02, 2021, 06:36:19 PM
Im a little concerned as well with your safety when doing this randy.. no personal experience trying it but it concerns me.. i would be afraid with all the hot gases being able to go around the bullet as its wobbling down the bore it could soften it to the point it may deform and get lodged in the barrel.. we all know what happens when the next one is sent..would hate to hear about something bad happening  to ya buddy..

Could you use a mandrel and partially size the necks to the desired size plus creating a false shoulder to help with the ftf's
Title: Re: Some Creedmoor varients
Post by: mnbogboy on April 02, 2021, 10:41:15 PM
Quote from: gman47564 on April 02, 2021, 06:36:19 PMIm a little concerned as well with your safety when doing this randy.. no personal experience trying it but it concerns me.. i would be afraid with all the hot gases being able to go around the bullet as its wobbling down the bore it could soften it to the point it may deform and get lodged in the barrel.. we all know what happens when the next one is sent..would hate to hear about something bad happening  to ya buddy..

Could you use a mandrel and partially size the necks to the desired size plus creating a false shoulder to help with the ftf's
the brass is snug as  far as i am now. The ftfs are not caused by loose headspace the firing pin has not even touched the primers. I am not sure that the case heads end up too low in the original 3006 chamber. Have more to check.
Title: Re: Some Creedmoor varients
Post by: DHuffman on April 03, 2021, 11:39:58 AM
Quote from: mnbogboy on April 02, 2021, 10:41:15 PMthe brass is snug as  far as i am now. The ftfs are not caused by loose headspace the firing pin has not even touched the primers. I am not sure that the case heads end up too low in the original 3006 chamber. Have more to check.

I'm still not sure I understand the purpose of all this Randy.

A FTF during a FF operation is usually excess headspace so If the ftf's are not caused by headspace but because the case is too low in the chamber I think you need to stop immediately because if they're that loose at the case head and one does somehow go off I'd expect it to rupture or separate the case head pretty violently.

If I'm misunderstanding and talking out my ass then disregard.
Title: Re: Some Creedmoor varients
Post by: mnbogboy on April 06, 2021, 10:55:12 AM
Quote from: HufD63 on April 03, 2021, 11:39:58 AMI'm still not sure I understand the purpose of all this Randy.

A FTF during a FF operation is usually excess headspace so If the ftf's are not caused by headspace but because the case is too low in the chamber I think you need to stop immediately because if they're that loose at the case head and one does somehow go off I'd expect it to rupture or separate the case head pretty violently.

If I'm misunderstanding and talking out my ass then disregard.
javent been in the shop for a couple of fays. I dont think the chamber is that loose. The reamer would jave had to be way ofg to get ot that way. Hopeflly i get out there soon to investigate. A ruptured cade head wpuld be a cayadyrophy for sire.
Title: Re: Some Creedmoor varients
Post by: mnbogboy on April 22, 2021, 08:49:00 AM
Thanks grant, ive watched several videos including that one
Title: Re: Some Creedmoor varients
Post by: mnbogboy on April 22, 2021, 10:25:25 AM
Stilll no joy.
Title: Re: Some Creedmoor varients
Post by: mnbogboy on November 26, 2023, 11:22:56 PM
I got to reading this old post and it reminded me of why I had the ftf problem that lasted so long!
Pit turned out that the priming pins on my old heaters presses were bent and they were starting the primers cock eyed in the primer pockets extra pressure on the press handle was then deformity the cprimer cups enough that the anvils were falling loose from the primer! I replaced the pins and that instantly led to easiercriming and no more loose anvils when I deprived! If I rember right I had the loose anvils problem for several years!! Ftfs are pretty much non existent now and since I bought a Lyman hand priming tool things have become much easier!
Title: Re: Some Creedmoor varients
Post by: mnbogboy on April 05, 2024, 12:07:19 AM
Quote from: mnbogboy on April 01, 2021, 10:02:06 PMno, just a 30 cal barrel that will accept all the other brsds mentioned. The smaller bulletswill rattle down the bore.
this experiment never panned out and that was 3 years ago! I'm only looking at old posts today to kill time!
Title: Re: Some Creedmoor varients
Post by: jvw2008 on April 05, 2024, 08:44:03 PM
Good to see you back on the forum sir!!
Title: Re: Some Creedmoor varients
Post by: DHuffman on April 05, 2024, 09:16:40 PM
Quote from: mnbogboy on April 05, 2024, 12:07:19 AMthis experiment never panned out and that was 3 years ago! I'm only looking at old posts today to kill time!

I was wondering if Jerry was going to have to write you another letter and reel you back in.
Title: Re: Some Creedmoor varients
Post by: jvw2008 on April 06, 2024, 12:43:27 PM
We miss you when you're not around Randy! 😊 Over the last month I've had several folks ask if you were doing ok. 😊