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few do from a 3.7" barrel.....its a careful work up, specific to the firearm worked up in .....it does however fall into the original Norma loadings for the Bren 10I'll have to check my log when I get home - don't think any load was moving a 180 past 1,200fps.
Other than I sternly believe in knowing velocity to detect spikes and such when ladder testing and working up loadsI am sure there is some value to a chronograph but I don't believe one is 'playing with fire' if not using one. I have been reloading for a LONG time and never used or owned one - yet at the same time never have experienced anything like you are, or problems like anyone else has for that matter. It is my belief (and experience) most reloading problems are from a lack of attention to details, not following established load data and a myriad of other self-inflicted mistakes - one being the mot often unreasonable need to load to the highest velocity attainable - and have know those who had admittedly exceeded established data to do so. What few mistakes I have made I discovered before firing the ammo and corrected them.
This thread has great observations and opinions. But,
Wish Benchrest had started out with a problem statement instead of "cuteness"
Benchrest's Wyoming Arms Parker 10 mm, extract, eject issue
Parker design has function issues that weren't fixed.
Does it cycle with factory loaded 10 mm?
Only cycles with hot loads?
Firing pin hole enlarged? (expensive fix)
To start, I would:
choose a factory loaded cartridge and stay with it.
Shoot to test function. FTEE?
Stone and polish Parker's bearing surfaces, lube.
Shoot to test function. FTEE?
Recoil spring stiff?
Maybe (if your Parker is has a 5 inch barrel) replace the recoil spring with a 1911 spring and re-test.
Consider the Parker as a collector that has disappointing performance and sell or display it.
few do from a 3.7" barrel.....its a careful work up, specific to the firearm worked up in .....it does however fall into the original Norma loadings for the Bren 10
Wish Benchrest had started out with a problem statement
Benchrest, I know you said it'd be a while 'til you got to the range again but when you do, I'd be interested to see how this condition is somehow finally resolved!
Excellent! Looking forward.Tomorrow
nasty, you positive that feed ramp or lede isn't causing some sort of set back ?