1909 Argentine Mauser range report

[Calfed]

Last year I got a pair of Argentine Mausers--a 1909 long rifle and a shorter Cavalry carbine. I finally got a chance to work on a reload for the long rifle.

Here's the long rifle:







And here's the target:


40 grains of 4064/174 gr .311 SMK/CCI 200 primer/2.875 OAL @ 100 yards off a sandbag rest

IMR 4064 has become my defacto favorite powder. I experimented with 40 to 43.5 grains of 4064 with a .311 SMK seated to 2.875 OAL. Took me 4 rounds to get the seating depth correct (first 4 were seated too deeply). Those 4 went high and a little wild. The next 6, all seated to 2.875 OAL, grouped together.

I'm figuring that the bullets seated too deeply may have reduced the case volume and caused a minor pressure spike.

Information

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