16in50calNavalRifle
Member
- Joined
- Mar 7, 2009
- Messages
- 355
I know there are several experienced 30 carbine reloaders here, so I thought I'd ask a few questions, as I'm about to get a trimmer in anticipation of needing it for 30C reloads. (I have searched and read on this topic in the forum, but did not see anything precisely on-point)
I reloaded 300 once-fired factory cases (Aguilla, PPU, Remington) as my first actual reloads when I started last fall. With the exception of a 2 or 3 FTF, they all shot just fine (out of an Auto Ordnance reproduction and a 1943 Quality Hardware). I did not trim those cases the first time.
I also have 500 new unfired Lake City cases on hand that I picked up from PolyGun Bags.
My measurement of the (now) twice-fired cases shows an average case length of about 1.277, with only a very few much longer than that (they have not been resized); the Lake City all measures right at 1.286.
The Lyman 49th manual gives 1.286 as the "trim to" length, and cautions not to trim below that. The SAAMI specs, off their website, give a minimum case length of 1.290 and a maximum of 1.300.
1) Is it odd that the SAAMI spec minimum is larger than the Lyman trim-to number? And also odd in that case that the LC brass is right at 1.286? I realize my measurement and even trimming precision are probably too coarse to reliably see the .004 difference - but still .....
2) Stupid question - will I get a longer measure on my twice-fired brass AFTER I resize it?
3) According to the SAAMI spec, I can reload any case that measures up to 1.300 without trimming, correct?
4) Should I resize the LC brass and measure again, before proceeding? First time using unfired brass of any caliber.
I anticipate having to trim at some point, and so will continue my shopping for trimming equipment in any case (also expect to load 30-06 in the future, to feed my CMP Garand that is due some day soon ....). But if my experienced brass measures shy of 1.300 after resizing, it looks like I can go ahead and do my second batch of reloads without trimming, using the used brass and the new LC.
BTW, I stick strictly to duplicating original loads for the M1 carbine - 110g FMJ over 14-15g of H110 - with a hard CCI SRP.
Answers or advice appreciated.
I reloaded 300 once-fired factory cases (Aguilla, PPU, Remington) as my first actual reloads when I started last fall. With the exception of a 2 or 3 FTF, they all shot just fine (out of an Auto Ordnance reproduction and a 1943 Quality Hardware). I did not trim those cases the first time.
I also have 500 new unfired Lake City cases on hand that I picked up from PolyGun Bags.
My measurement of the (now) twice-fired cases shows an average case length of about 1.277, with only a very few much longer than that (they have not been resized); the Lake City all measures right at 1.286.
The Lyman 49th manual gives 1.286 as the "trim to" length, and cautions not to trim below that. The SAAMI specs, off their website, give a minimum case length of 1.290 and a maximum of 1.300.
1) Is it odd that the SAAMI spec minimum is larger than the Lyman trim-to number? And also odd in that case that the LC brass is right at 1.286? I realize my measurement and even trimming precision are probably too coarse to reliably see the .004 difference - but still .....
2) Stupid question - will I get a longer measure on my twice-fired brass AFTER I resize it?
3) According to the SAAMI spec, I can reload any case that measures up to 1.300 without trimming, correct?
4) Should I resize the LC brass and measure again, before proceeding? First time using unfired brass of any caliber.
I anticipate having to trim at some point, and so will continue my shopping for trimming equipment in any case (also expect to load 30-06 in the future, to feed my CMP Garand that is due some day soon ....). But if my experienced brass measures shy of 1.300 after resizing, it looks like I can go ahead and do my second batch of reloads without trimming, using the used brass and the new LC.
BTW, I stick strictly to duplicating original loads for the M1 carbine - 110g FMJ over 14-15g of H110 - with a hard CCI SRP.
Answers or advice appreciated.