Went to load some 32-20 with a new batch of Bullseye and a 100 grain Vance .313 RNFP bullet. Normally use a No. 5 RCBS little dandy rotor and dump 3.5 grains of Bullsye. I weighed it and it was really low. So I tried a #6 rotor and it was under 3.5 so I thought this is a less dense batch. Like a dumba$$ I used the No.7 rotor and my RCBS 505 scale said "3.5 grains" without double checking on another scale.

I shot about 20 of these the other day and they using a Smith & Wesson M&P 32 (Winchester) revolver made in the late 1920's so it should be heat treated. They shot to the point of aim at 15 yards and shot around a 2-1/2 inch group at 25 yards just a little high. I noticed they felt sort of peppy. I proceeded to blast down 6 plates at 50 yards. When I got home I checked the powder weight on an electronic scale and they have 4 grains of Bullseye in them. Just like the little dandy chart says a #7 dumps LOL.
So I guess I'm probably over 20,000 psi in this old Smith. I'm going to chronograph a few to get an idea as to what the velocity was before I dismantle the other 80 of them. The cases didn't show any signs of stress and leading was very little. Those chambers are pretty thick on the 32-20 Smith but the gun is over 95 years old.

My RCBS scale was out of whack and the powder is OK.............Dang

Bob

from the Marlin 1894CL rifle, using 125 gr. jacketed AK47 bullets. I shot animals that weighed upwards of 120 pounds and dropped them with those loads. The brass held up pretty well.

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Ele era velho.
Ele era corajoso.
Ele era feio.

Chronographed 12 rounds today and they averaged 997 FPS. More were over 1000 fps than were under.

Bob