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Welcome to this community for the Creedmoor metallic cartridges enthusiasts. We have been sharing information here since February 2010 and have grown quite a bit since. Please join us and share your experiences with the Creedmoor cartridges, and also please spread the word about the forum. As we continue growing, the forum will become an even greater resource for all of us.


Recent Posts
2
Wildcats / Re: 6mm ARC
Last post by Windsage -
I have a 6.5 Grendel and almost built a 6mm upper, but decided to go all the way and have been load testing a .224 Grendel instead.  So far, it's pretty fun. 
3
Reloading / Re: 3 shot or 5 shot groups??
Last post by Windsage -
Starting with no data. I load 3 of each load in 0.2 gr increments.  (30 rounds).  Generally this is done at 0.020" off the lands.  I shoot those at 100 yds with a chronograph on.  Then I look for the node by comparing the standard deviations and extreme spreads of the 3 round sets and then comparing each three with the average velocity of the load higher and lower.  What I am looking for is a load that has less change on powder increase and low 3 round SD.  When you graph it it's a flat spot in the graph.

This generally results in my going back to the range with new loads at 0.1 gr increments but only maybe 4-5 loads.  I do 5 round loads of these and shoot them at 300 still with the chrono.  After that I toy with the distance to the lands a bit if I have room in the mag.  On most rifles, this will get you under 0.5 moa with SD's that work well past 1,000 yds. 

See attached photo for homemade spreadsheet.  I took the information from this spreadsheet and loaded a new set of rounds at 28.0-28.4 for further checking.  Note that this was done using a Chargemaster Lite, which seems to only be capable of delivering mid to high single digit SD's.  If I check them by hand on a better scale I can generally cut the SD's of most loads by about 4-5 fps, but for most of my shooting the Chargemaster is fine.

PS: Do not use my numbers.  This is from an oddball .224 Grendel AR
4
AR Variants / Re: First AR platform rifle
Last post by Ranger 188 -
Robin, this is the place for you.  I've owned a couple of them in different
parts.
This place is American parts and people just down the road from me.
They make very good quality for a reasonable price.
You can also configure one a little to what you want.
You will have to replace the trigger. In any brand.
http://rockriverarms.com

Another great company is, Bravo machine company. (I owned one of theirs for 10 yrs. or more)
This company is top notch for quality and price, you will never hear a bad word about them.
https://bravocompanyusa.com
5
AR Variants / Re: First AR platform rifle
Last post by rardoin -
Thanks Grant.  I'm guessing I don't need to spend $2500+ to get a great AR ;) .  I've heard alot of positives about PSA.  Any thoughts?
6
AR Variants / Re: First AR platform rifle
Last post by gman47564 -
Robin i bought a oracle dpms several years ago.. hated it.. couldnt hit crap with it.. 2moa maybe.. so it set in the gun safe .. about 3 years ago my boy went to work for a guy that built ar's and he told me i should put a better barrel on it.. so one day he came home with a 18 inch 223 wylde barrel and put it on along with a different hand gaurd.. the gun shot way better.. good enough to put a better trigger in it.. so i put a timmney trigger in it and now its a half moa gun and never had a problem with it cycling.. good gun now.. may have 700 dollars in it..
7
AR Variants / First AR platform rifle
Last post by rardoin -
I have never owned an AR platform rifle.  I have always planned on getting one though.  When I do I will get an AR-15/5.56 chambering.  I am not interested in building one but buying a whole rifle.  My first consideration has been to buy a Wilson Combat Ranger.  I am leaning toward a WC only because I have one of their 1911's and it is a phenomenal pistol...but very pricey as is their AR platform rifles.  I would like to get something that will run well without issues and have good accuracy and am willing to pay for it.  However, if I can find a 'pretty damn good reliable and accurate' AR for a bit less dough, which I suspect I probably could, I'll give it high consideration.  So, please give me your recommendations and, again, assume I know nothing about AR's since I have only shot one on one occasion.

Robin
8
Reloading / Re: 3 shot or 5 shot groups??
Last post by rardoin -
I shoot competitively (well...some days that is arguable O:) ) at 600 and 1000yds so I like to do my load development at 1000yds for my final tuning.  But when I am testing a new powder or chambering and have no previous data to start with I'll shoot at 300yds  to start.  I don't mind using 3 shot groups to start 'coarse' development...such as .5gr powder increments....to get an idea of where it wants to shoot and is grouping at a consistent POI.  When I have found an area that I want to focus in I then go to 5 shot groups.  All my fine testing (.1-.2gr increments or seating depth testing) is with 5 shot groups.  For a hunting rifle I have always just used 3 shot groups at 100yds.  For a "let's see how small I can get this gun to shoot" fun at distance rifle I do as above for my comp rifles except at 100-300yds.  Now for really fine tuning my comp rifles I'll shoot 10+ shot groups looking the load behavior over long strings since we shoot 20 record shots/20 minute-30 minutes and I want to make sure there is no monkey business once the barrel is good and hot.
9
Reloading / Re: 3 shot or 5 shot groups??
Last post by Ranger 188 -
Depends on you.
3 shots, is usually the group and 5 shots is how good you are.
In load development, if your confident in your abilities then in
3 shots you will see what the load looks like, if not sure of yourself
then 4 is much better. At 3 shots, if you pull one, then you only have
2 shots and that's isn't enough to see what a group is doing.
Load your different loads in no more than .3g of powder difference.
If you go .5 you might miss a node or not see if it was coming in or going away.
You don't have to get for crazy for distance either. The farther you go, the more
outside influences will throw the groups off.
Once you have it narrowed down, then go long and fine tune it.
10
Reloading / 3 shot or 5 shot groups??
Last post by Hawkeye_12 -
I am currently working on load development and i think i have a formula that i want to test for accuracy. is it best to do 3 shot or 5 shot groups and why?

  Recent Posts

Re: First AR platform rifle by rardoin
[Today at 02:53:04 PM] in AR Variants


Re: 6mm ARC by Windsage
[Today at 02:01:17 PM] in Wildcats


Re: 3 shot or 5 shot groups?? by Windsage
[Today at 01:52:01 PM] in Reloading


Re: First AR platform rifle by Ranger 188
[Today at 01:48:07 PM] in AR Variants


Re: First AR platform rifle by rardoin
[Today at 01:35:55 PM] in AR Variants

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