How important is exact science with your 10 short?
I am new to the forum, new to reloading the 10 short, and have learned most everything that I am doing from reading this forum. Specifically I quickly settled on using the Peter Lester 19 grain red dot load. I started by hand measuring everything and using a roll crimper with hard wads stacked the whole way. I have had good results, but, it is VERY slow.
I bought a MEC 10 ga Steelmaster, 200 Remington unprimed hulls (I believe they are SP hulls), 100 Cheddite primed hulls, Remington SP-10 wads, Schoeller PT-1044 wads, and a big bag of 16 ga 1/2" fiber cushion wads.
I started with MEC Powder bushing 32 which was to throw 19.2 grains of Red Dot. I found it always throws sub 19 grains. I changed to bushing 33 which throws 19.5 grains. Ok there.
I am using a MEC 1 1/8 oz bar but it consistently throws 475 gr of 7.5 shot instead of the target 493 gr charge. I am thinking of upping the bar to the 1 1/4 oz bar and seeing how far over the 493 gr target it throws.
Why am I concerned? I have been using 3 different overshot cards to try to keep a nice 6pt fold crimp on the shells. I literally charge the shell with powder, wad, and shot, pull the loaded shell and inspect the height, then select the os card that will best adjust the crimp. I am using a full down stroke to seat the SP-10 wad and have not really read the wad pressure to see if it is consistent.
I think some of my issue is my case cutting technique. A caliper shows that there is variance in my shell lengths. I have also found that there is a difference in the filler wad thicknesses (again using a caliper).
How important is any of this to you veteran 19 grain Red Dot shooters? I guess I am just trying to really standardize my load and have perfect 6 point fold crimps.
Opinions and suggestions would be appreciated.
v/r rch
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