m1 carbine case length

[testhop]

i have been loading loading for years but this is a 1st for the carbine.
the problum is the case lenght fhe loading books say not to trim below
1.286 but most of my cases are from 1.281 to1.288
are theses cases alright to load or not the load will be 11 gr. 2400 with 311359 .

[USSR]

They are fine. Sierra's manual lists 1.280" as the trim to length, and I even trim them a couple thou shorter.

Don

[williamwaco]

I have been loading for decades and I have rarely found a new or once fired case of any caliber that was not already shorter than the "Trim to length."

[zomby woof]

I do a lot of loading for the 30 carbine. The trim to length is 1.280. The max length is 1.290. trimming this case is a PITA, no easy way. I size all my case, then measure and separate into trim and load piles. I trim everything from 1.287 and over to 1.281ish. Most of my cases are coming once fired from Aquilla ammo. The cases are usually well over 1.290 after the first firing.

Here's some info from "shooting the Carbine with accuracy"

MOST IMPORTANT: The .30 Caliber Carbine case has a maximum length of 1.290”. The fired and
reloaded cases should be trimmed to minimum every reloading. Reloading die makers usually specify a
longish "trim to" length on the order of 1.285”. The minimum length for Carbine cases is 1.280” and has
been observed to be more satisfactory. This 1.280" is the normal factory length of new ammunition.
This length of 1.280” helps prevent failure to lock with the bolt forward but not rotated and subsequent out
of battery firing. Too long of cases wedge the bolt forward, but do not allow easy rotation to full lock up.
Too long of cases are the main cause of most problems. Carbine cases stretch at seeming random. Trim
every reloading. Some cases will be unmarked by the trimmer cutter, others will be partially trimmed on
one side, and others will be fully engaged with the trimmer cutter

[jcwit]

Easiest way to trim Carbine cases I've found is with the Lee Case Triming set-up.

http://www.titanreloading.com/case-conditioning-tools

Check it out. I use it with a battery powered driver.

[zomby woof]

Easiest way to trim Carbine cases I've found is with the Lee Case Triming set-up.

http://www.titanreloading.com/case-conditioning-tools

Check it out. I use it with a battery powered driver.

I started with the LEE set up. My thumb started to hurt tightening the case into the holder.

Here's my set up for 30 Carbine. I did 700 on Saturday.

[jcwit]

Looks good.