.308 Winchester lead bullet seating depth

M

Maximum

Regular
Rating - 0%
0   0   0
Location
Alberta
Hi I have a bucket of 183 grain lead cast (BHN ~12, .310" RN), gas checked bullets I'm trying to work out a lightish load for plinking.

I've shot 10 rounds loaded with 33.5 grains IMR 4895 from my BLR. They came in at ~2000 fps, which was a little faster than I guessed at.

The problem is for them to chamber I have to seat them really far in because of how round the noses are, level with the bottom of the shoulder/top of the case. I've read comments on various forums such as "too far in" and I can't find an explanation of how far is too far and WHY, other than possible powder compression. Is there a problem here? Thanks.
 
if you can find trailboss, that will make very light plinking loads, other powders are unique, red dot, or 2400. but wait for others to chime in on that as i'm not a big rifle shooter.

as long as you start with the minimum or lower charge, seat them to the depth required to chamber in your gun and work up from there.
 
Too long=
when you chamber a round and Don't fire it but remove it from the chamber, Bullet pulls out of the case and stays in rifling (extreme case )
too long = when you get rifling marks when you get marks on the bullet when you pull a loaded round from the chamber
tool long = when it wont fit in the mag
 
There will be no problem, with what you are describing.
There would also be no problem, if you do compress the powder.
 
I've heard not to seat the base of the bullet past where the shoulder meets case neck. This is something about cast bullets specifically. The reasoning was upon ignition, any part of the bullet not protected by the case neck was subject to extreme heat. Apparently it causes leading and poor accuracy.

That being said, I have sunk em in past the shoulder, and they shot ok for what they were.

Just something I heard, but not yet had a chance to validate, hope it helps.
 
I load cast and swaged CMJ bullets in 30 caliber over Trail Boss. My bullets are quite truncated (short and tubular like the ones you describe) and these need to be seated deeply, simply because the ogive is very abrupt. Just visualize a pointed bullet sitting side by side with these short fat bullets, and imagine the contact point on the ogive with the rifling. I rest my case. :)
 
You must log in or register to reply here.
Back
Top Bottom