Pat I
Larry I'll start looking for them and let you know when and if I find them. Norma's good brass and I think the neck thickness is around .014 and pretty consistent.
Sounds like a plan and no real hurry. This testing will involve numerous sessions over a period of time (probably a couple months at least as I've some other things to do that take me away from home) . I also have measured the other cases i have and they all run around .14 to .18. None of them have been turned concentric so it's hard to get a consistent measurement on the case neck measuring device I have.
I'm just trying to narrow down how someone is getting 2300+ fps and 1/2 moa groups with 31 grs of 4350 and would like you to just load a normal load sans filler in good brass to see the velocity and accuracy difference a filler and formed 06 brass makes.
I can do that easily. I'm hoping to get out tomorrow, if the weather breaks, and test some loads of 4895, AA4350, H4831SC and 3100 with a 3/4 dacron filler. This is with the expected start load range I will use with the "original buffer" to give a comparison. Unfortueately it looks like the origianal buffer and other supplies others are sending won't get here for a while so I don't expect to test the 466455, the BaBore 266469 or the Kurz GB bullets for 3-4 weeks at the soonest.
It can't be the powder because SM said he's done it with 4895, 4350, and 4831/3100 which just about covers the conventional rifle powder burning range. It can't be the primer because SM uses Wolf and 45 2.1 has said he's been doing it since the late 80s and Wolf wasn't around. Can't be the lube since SM said he's had success with LBT and a couple of homemade lubes even if it was in different cartridges. Can't be the fit because 45 2.1 uses .001 neck clearance and SM said his loaded neck diameter was .297/.298 which would be about anywhere from .005 to .008 under chamber neck diameter if yours and my measurements were correct. Can't be the bullet because if I remember right more than one bullet was successfully used. Atmospheric pressure, temperature and altitude are basically none issues and aren't going to make a 5 inch group into a 1/2 inch group. So basically all that's left is the filler and I'd like to see if it really did make a difference in pressure and accuracy. I'm not slamming or doubting anyone here so don't fly off the handle. If any of my Swedes were scoped I'd join in the fun but my eyesight and irons wouldn't prove anything one way or the other except that I can't see. I have the equipment and knowledge to make it happen just not the eyes.
Good observations and conclusions, it will be interesting to see what the tests reveal with the above bullets coming my way. Thanks to all, yes that includes starmetal, for sending supplies for the tests.
Larry Gibson