Hi
I had this posted before on another forum, but if it helps you.....
I have been reloading for about 20 years. I have been reloading 7.63 Mauser for about 2 years now, but I had been preparing for the Mauser caliber for some time. Scrounging any brass I could find, books and info I could buy, barter, or steal.
I have found that the most important reloading tool is the cronograph. Ammo catalogs are full or crap.
So the first thing I did was test fire some factory ammo in my Broomhandle and a friend's Bulgarian Tokarev. My Mauser is a M30 with a 5.2inch barrel. the Tokarev has a 4.6 inch barrel
Sellier and Bellot does an average of 1390fps out of the Tok
1986 nny Yugo does an average of 1395fps out of the Tok
Fiocchi 7.63 Mauser does an average of 1230fps out of the Tok
Fiocchi does an average of 1247fps out of my Mauser
Finnish made 7.63 ammo dated 1958 averaged 1265fps
I took one DWM round out of my collection; 1345fps
And pulled Sellier and Bellot reloaded with 7 grains of their factory powder does an average of 1263 fps At $10 a box, it's cheap shooting, and reloadable brass.
Starting fresh:
Using Sierra's 85grn JSP bullet
I have 3 pistol powders I play with, Nobel Pistol Powder #3 (bullseye clone) , IMR SR 4756, and IMR SR 7625
In the Mauser with an Overall cartridge length of 1.375"
5.0 grns of PP3 does an average of 1236fps
SR4756 (averages) 6.5grn/1161fps 6.7/1300fps 7.0/1390fps
SR7625 (averages) 5.0/1055fps 5.5/1239fps 6.0/1320fps
SR 7625 makes very accurate ammunition and it is quiet compared to Fiocchi factory ammo.
I have been testing a hard cast (Linotype) 84grn cast bullet. I only lube the bottom groove and I crimp in the top groove. I tried all three powders and only SR 7625 gave me good accuracy that made casting worth while.
4.5 grains was strong enough to work the action, and cause a minimum of keyholing.
Sticker
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