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Topics - jvw2008
I want sensitivity during seating, consistent and adjustable seating, and not hand cramps after a batch of 300 cases. Oh, I also don't want the process to take forever, and I don't want to pay $600 for a Primal Rights competition seater. Ha! Ha1
So if the Competition Seater is out due to cost, what other alternatives do you recommend?
I guess this whole project came with trepidation since I also haven't been able to do load development with my favorite Bergers. After surveying the field, I settled on the 140 ELDM and said "what the hell, all I've ever used is H4350, but lets try some R16". Played with some predictions from QuikLoad, ran single velocities for 39-41.3 grains and found plateaus in the low 2700's and low to mid 2800's. Followed with an OCW between 40.6 and 41.6 gr of R16 - mid node came in at 41.2. Seating depth correction from the original 20K to 30K is giving consistent 0.250 -0.350 MOA at 100 yards (2830 MV). This morning I put 35 of these rounds down my range from 325 yards out to 1250 yards - finished the session with four out of five hits on a 9 inch piece of steel at a 1012 yards. Considering the driver, that's more than acceptable off a bipod. For my environment, this R16/140 ELDM load is pretty amazing. DA this morning was roughly 8500 (80 degrees, 6000 ' altitude). Because of the ELDM BC and the high DA, this 2830 MV doesn't deteriorate to 1200 fps until 1880 yards - eat your heart out Danny. ( )
In addition to being one of the easiest barrels I've ever had for load development, there are some other observations I thought I might share. For me, one great feature was the barrel held its node from 100 all the way out to 1000 - no tweeking necessary. On occasion, Ive found groups at a 100 that aren't representative of what's going on at 600 or 1000 - especially with a commercial barrel. Next point; all of my Bartleins have been 5R, obviously hand lapped, and easy to clean. The 4 grove HH is at least as easy to clean - maybe a little easier. As I did load development, cleaning, and then re-fowling before acquiring groups, I did find that it took at least ten shooters before I felt the barrel had resettled. That may be associated with the barrel brake in process and may get better - time will tell. Some one with more experience using R16 and 140 ELDMs would be a better judge than I, but it seems to me this barrel is fast. Maybe its just the properties of the R16, but I suspect the rifling plays a significant roll.
Summary: great gunsmith, good stable powder, damn good bullet ( jeez that's hard to say - I'm teasing you Rob ),
EXCELLENT barrel - I'm a fan.
New tool with an explanation of just how important rifle cant is when shooting distance. It’s pricey but if you are pushing for a mile it’s important to have the best you can get.
I'm using a Redding micrometer seating die with their 6.5 mm VLD stem. The unit is clean and functioning well with Bergers. With 147 ELDM's it leaves a small indention ring during seating with only moderate neck tension. Evidently this is enough of an issue that Hornady is now making a specific ELD seating stem for their dies. I'm kinda partial to my Redding system.
Anyone else in my boat? What's the best way to eliminate the problem, without screwing up bullet alignment, during seating the ELDM's?
Weights were taken on a Sartorius Entris 64 analytical scale (accuracy +/- 0.002 grs) and lengths were determined using a Mitutoyo ball micrometer and calipers.
I selected 20 random pieces of brass from a 100 count box just as they were delivered (ie. no prep on my part).
Neck diameter across two perpendicular sites:
0.289 “ +/- 0.001
Neck Thickness across 4 quadrants of each neck:
0.0139” +/- 0.0006
(note: this is the average of 80
individual neck measurements)
1.911” +/- 0.0005
Head Space (Hornady D comparator):
1.530” +/- 0.0005
448.060 grs +/- 0.248
*note: dry weight reported represents dry weight of case while connected to a Century 21 pocket plug. To get true dry weigh subtract 279.4 gr. (Edited 7/18/18).
49.962 grs H2O +/- 0.268
WOW! The case capacity tolerance just blows me away.
These little jewels cost about a buck a piece but I won’t be culling a single one of them because of too much variation. They come individually packed in a case that can subsequently be used for reloaded rounds.
I could not be more pleased with these results. You done good Mr Bob @ Alpha. 👍
God bless our country. May we never forget the principles of our constitution created 242 years ago today.
If you have five extra minutes today, take the time to reflect on the highlights of our history and what your part might be in the formation of what our future will be.
Have a great 4th of July folks. 💥
We have some very talented folks in our family. Here is a nice piece of wood craft by Mr Johnaron. 😊
Sorry I can only get the link to load. Missing a step somewhere get the image to come along.
There is about a weeks worth of part time work is these grips. Takes a while when you start from and old block of wood. 😊
Toroidal lugs are proprietary to the American Rifle Company Actions. First released in the Mausingfield action and now more recently in the less “beefy” Nucleus. The Mausingfield is expensive, tough, smooth to operate, and gaining popularity in the long range precision rifle custom builds. The Nucleus is less expensive but retains all of the core innovations of the Mausingfield including the toroidal bolt lugs. As a less expensive version of the ARC design, the Nucleus is selling like hot cakes. It seems that if this lug system is not what it’s cracked up to be, it won’t be long before the fat lady sings.
I know we have some very good engineering minds on the forum and I would like to ask for some EDUCATED in put here.
Im sure the list will not be totally comprehensive, but we will do our best. The glossary will contain reloading terms, as well as, some terms that relate to ballistics and rifle components if they are important to the goals of quality reloading. (ex. throat, leade, bullet jump, etc).
If there are terms that you think are misused, not well known, or confusing, please send me a PM with your suggestions for inclusion into the list.
We are thinking about a month to get this glossary put together and edited by all the monitors.
Thanx for you help,
I could have Gre-Tan bush the pin, but would need to plan for it if it’s a necessary change.