Quote:
Originally Posted by tlawler
Judging from my velocities, I would call these mild to slightly warm loads.
There’s not much load data on the 10mm Magnum, so I was working off what Taffin published...
|
Yeah, pretty good velocities. Having the extra 2.6" of barrel length is nice too (-vs- my 3.875" bbl.).
I test fired, but didn't (have a) chrono, 180gr w/2400@ 18.6grs. FWIW, QuickLoad estimated 38.2Kpsi. Didn't see any issues with it, other than some jump-crimp, which wasn't unique.
LOL, that vertical split is the way just about every 40S&W I've had split looked (in my auto pistols).
I've split 10MAG brass horizontally. The Manson reamer I used was machined to tighter specs than what S&W originally cut the chambers to which leaves the slightest of a "transition" between the two cuts.
I need to try some more to reduce those transitions in my chambers, without ruining the chamber shoulder's sharpness. (I like having the option to shoot without moonclips so a good shoulder to headspace the case mouth on is necessary for that.)
Anybody else run into this? Thoughts on fixing it? I was going to invest in a custom reamer of slightly larger diameter, to clean them up, but haven't committed to that yet.
.
The "transition" is the faint line near the mouth of the case. They split/separate where the brass starts to thicken, as it get closer to the web. I suspect because the case doesn't freely move rearward to the frame's breechface, when fired, because of the transitions resistance on the case mouth?
I don't think it's the brass' fault but I'm not 100% on that either.
.
.