[Guest]

Just wondering if you guys know anything about the probable cause(s) of this...

I shot a 'fun style' 3-gun match last month and had trouble extracting the chambered round following the course of fire for each stage, when manually retracting the charging handle. The rifle shot like a dream all through the match, and I had no problems with normal extraction, nor were there any swipes or other tell-tale pressure marks on fired cases. I had to retract the stock, pull back on the charging handle, and smack the butt on the deck to extract the chambered round. There were no obvious marks on those, either.

FWIW, here are the stats on what I was using:
Rifle: Ko-Tonics SPC II 1/11" twist 16" chrome-lined bbl, which Tim had already reamed out following the chroming issue. This one also passed the drop-through test using the little gauge that Paulo so generously circulated throughout the forum.

Ammo: Reloads, fired SSA cases under 28.5 grains of X-Terminator with 100 grain Speer HPs, crimped using a Lee crimp die. All cases were checked for length.
Thanks-
Pat

 

[Bushman_269]

No marks on the bullets to indicate they were engaging the rifling? Sounds like you may need to adjust your sizing die to bump the shoulder slightly. Were the reloaded cases originally fired in this particular barrel?

 

[Guest]

No marks on the bullets to indicate they were engaging the rifling? Sounds like you may need to adjust your sizing die to bump the shoulder slightly. Were the reloaded cases originally fired in this particular barrel?

Yep, fired out of this rifle only. I've not had this problem with other bullets, just the Speers. In fact, the force-extracted rounds did have marks from the rifling. I'll adjust the seater accordingly, thanks for replying.
Pat

 

[Bushman_269]

If the bullets are too long and engaging the rifling just set the seater die a little lower. What is OAL on your rounds with these bullets?

 

[houser52]

I had the same problem with my 5.56. Bumped the shoulder back .001 and they extract fine now.