I've got to admit, it's getting better, getting better, all the time...
"...it can't get, much worse!"
Took care of potentially the biggest reliability-killer today by cleaning up the chamber. Although, 'cleaning up' might be too soft a word. The reamer initially dropped only halfway into the chamber, and it appears a good .01" of diameter was removed in the course of cutting it. Basically, the factory chamber was exactly big enough for some rounds to fit, and no more. To fat/long a bullet? Hits the lands because there was no leade cut. Slightly fat case? Will wedge in the chamber and not go fully into battery (I'm not convinced this is so much a safety issue as it is a reliability issue)
After reaming, the case was as loose as a Suomi barrel, and as loose as my Hi Power barrel I checked against when I got back home. Fired cases now swell about .005" just like my other 9mms, whereas before there was zero expansion. Most importantly, the chamber is infinitely smoother than before. The chamber was dull and badly ringed due to dull/fast reaming, and left terrible sandpaper scratches on fired cases. After cutting it to the proper profile and a more consistent texture, I ran a Q-tip covered in honing compound with a power drill over it briefly to polish off any burs or flakes that might still be sticking around. After test firing today, I found the fired brass is shinier than it was before being put in the gun. Also importantly, there were zero failures to feed attributable to the chamber/ramp out of 250 or so rounds fired (granted, there were only 1 maybe two for that many rounds before hand).
Whether it was truly needed or not, the brass looks tons better and the chamber has a real leade to accommodate longer bullets that it was sorely lacking prior. The gun doctor did no harm
I also shined up uglier faces of the bolt, the feed ramp, the barrel exterior, and the recoil spring bushing some more with homing paste (just used rouge before which of course didn't accomplish much). Cleaned off some burs on the bolt that had formed from riding over the (previously) ultra stiff disconnector. Without a bolt or spring in the slide, nearly no force is needed to rack it (was about 5lbs originally). With everything in the slide, it's gotta be at or under 10lbs now
I did notice I seemed to be short stroking the trigger occasionally today, which I will attribute to my disassembly probably changing something. My theory is the disconnector return spring had an extra wind in it before installation originally, which is why it was so hard to drop and why the trigger return spring was strong enough to prevent short stroking. I reassembled the gun without the disco spring tensioned as significantly, so now it does its function with far less force/binding, but the trigger return isn't as positive (the return spring is only a pound or so, not enough to push your finger back quick when you relax after shooting). I'll have to try bending the spring a little to generate more deflection against it when the barrel is installed (the barrel tensions the spring leg)
Oh, and the trigger is developing the elusive "tactile reset" in that an audible click now occurs when the stirrup bar falls back down in front of the sears. I personally think that with pre/over travel minimized with a better trigger lever, no one would have trouble short stroking the gun (trigger take up would be ~3/32 and the break another 1/32 with no over travel. Clean up the sears and it'd be even less than that)
As far as the range report:
My biggest fear was realized; the gun
does recoil a bit more now that the cases come out easily. Still low for a gun its size, and still no fatigue/soreness in my hands after shooting (just the thumbs from loading mags and my index knuckle from whanging my hand on something at the range
), but recoil has a 'magnum' smack to it now that I don't seem to recall from before. Ejection is no harsher, so it may actually be completely my imagination
This time I brought four different brands:
-Remington Golden Sabres: very first round FTF from the mag (hollow point on the magazine forward ramp again) but I think I didn't have the round seated in the mag properly. No subsequent issues of any kind. 28 rounds, total.
-Blazer Aluminum case crap-o-rama: no issues of any sort. 100 rounds, total
-Winchester white box crap-o-rama: one failure to eject, where the case was stuck between the base and neck alongside the properly-feeding round by the slide. This stuff didn't seem loaded as hot and ejected fairly close by. 100 rounds, total
-Corbon +P (135gr, I think?): Either this gun damps initial recoil better than I can imagine, or the whole 9mm +P thing is totally overblown. Increased recoil/blast was barely detectable, if I wasn't simply imagining a difference. No issues of any sort. 14 rounds, total
Accuracy was pretty close for all of them, though I was admittedly a getting a bit tired by the time I went shooting and wasn't trying particularly hard. 6-10inch groups at about 20 yards, all consistently 12" to the right of aim while it was dead on previously (could easily be due to the new chamber, or the fact the pistol bay is like a breezeway directing ~30mph gusts laden with dusty sand in that direction, or me just not trying very hard.) Sights haven't moved any and the original chamber and new one are both bore-centric (though the new one isn't egg-shaped) so I'm inclined to place the blame on me. I'm probably heeling the grip to the left and flinching.
So now we're down to 1-maybe-2 failures in 250 rounds
TCB