Discussion in 'Handloading and Reloading' started by horsemen61, Jan 7, 2018.
Range pickup, assumed they were fired in a Garand at the Garand matches, maybe not though.
won’t say it’s perfect but variations have been minimal. like all this stuff, once I get the knack of this it goes smooth.
happier than I thought I’d be.
How much is the oal off ? If it's a few thousanths either way, don't worry about it.
If you have a box of factory ammo, go measure some of them. It may very well set your mind to rest.
I tried to work the crimp out of some test cases with my C&H swage die, but it is not working very well... either it doesn't swage the crimp out, or I bend the rim. Works well enough with LP brass... it's just the SP brass that's the problem. So that's on hold until my Lyman case prep station arrives.
Loaded up 50 223 for the Savage 11, the yotes been yippin around the farm the last few nights, hopefully ill be able to take a few out of the pack.
Took another inventory of projectiles. Im still good.....for now
I'm setting to 1.100" By shorter typically 1.0970-1.0989 with a digit of 1-9 in the 10/1,000's. I went ahead and ran the short ones that were within 9/10,000's as I figured that wasn't enough to make a substantial pressure difference. Is there an acceptable tolerance?
I feel the variance in the brass lengths is causing the problem. I'm shooting for everyone to be the same, is that an unrealistic goal? I feel i need to trim all my brass to the same exact size to do that?
I did do that with factory ammo a while back, yeah It was not consistent.
for 9mm? I've seen no difference in my M18 from 1.05-1.15" in chambering and ejecting. Accuracy could possibly be affected but the bullet still outshoots me 100 times out of a 100 so as long as I'm within .01 of what I want (I also set to 1.1") I don't look twice.
(Edit- 1.05 looks wrong too. If you load one up to look at, it doesn't look right haha)
I, personally, don't see an issue with +/- .003..As far as going to the .0001, I'm not sure even the benchrest guys do that.
By chance, did you size all these cases before loading ?
If the bullet is moving around after seating, sounds like a neck tension issue.
Just my 2 pennies.
Loaded 100 .30 M1 Carbine rounds.
115 gr SNS HiTek coated RN over 14.0 gr H110,Starline cases, 1.675" COAL.
I went back in the room and measured a few more and some are .005-.006 ( some like 1.094..).and few ten thousandth's shorter.
I did size them all through my rcbs 9mm luger die. They are Blazer and Ammo Inc cases lengths are all different, shot twice now, I think that is mostly causing my issue on constant length. But It's nice to know I have some wiggle room and wont stress if they arent all the same.
As far as the neck tension, Had that happen on my last run so I'd run them through the crimp die as I thought this would help "squeeze" them, then bell it slightly(like barely) again and re-seat, this seemed to work. on most of them
Appreciate your input, Thanks!
Yes for 9mm. I'm not worried about feed issues as the ar9 seems to eat any RN I throw in it. Just not trying to over pressure and get hurt.
My current loads btw...
Berry's 115grRn ,5.0grCFE-P, Rem 1 1/2's 1.100 oal
I would double check your sizing die.
I feel that you shouldn't be having as much trouble with seating length.
Mixed cases with varied lengths shouldn't cause that much of an issue, unless a really hard crimp is being used, IMO.
My understanding, and one of the more experienced reloaders can correct me if I'm wrong- but the longer the OAL the more the pressure so if you load a test round at something way outside your margin (say, 1.12) and see no pressure issues you'll be fine. I'm unsure exactly how much a longer OAL will affect pressure but I have to feel it's not extremely significant outside those that are actually getting the neck forced into the barrel. Would love some confirmation on that.
Longer OAL = less pressure, shorter = more pressure. Exception to this is if the bullet is touching the lands, then you will have a spike in pressure.
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