Nora
06-02-2009, 03:19 PM
I'd recently tried adding Polly Fluff pillow stuffing as a fill to my 54R load with some promising results. In working up loads with it I thought it would be fun to try different amounts to see how they may effect the pattern size in my Carcano carbine. I crono'd the rounds and found a bigger surprise in the velocities. All other things being the same It showed that the more fill used, reduced the fps, and seemed to also have an effect on the consistency in speed. This will definitely need further work, as I don't consider 12 rds each target to be fact but is interesting just the same. I didn't position the powder for any of the rounds, it was just loaded and fired.
Any way, here's how it played out.
Rifle used: M91 Cavalry Carbine with 17.5" barrel
All thing constant: 6.5x52 Carcano. Prvi brass, Rem 9 1/2 primer. 10 gr Unique, topped with a 140 gr 266469 gc'd (Hornady) and lubed with LLA.
Polly measured in grains
FPS............High.........Low..........Av....... ... SD
No Fill........1364........1324.........1347...... 40.15
.5 Fill.........1347........1322.........1335...... 24.74
1 Fill..........1336........1305.........1317...... 30.72
Any way, here's how it played out.
Rifle used: M91 Cavalry Carbine with 17.5" barrel
All thing constant: 6.5x52 Carcano. Prvi brass, Rem 9 1/2 primer. 10 gr Unique, topped with a 140 gr 266469 gc'd (Hornady) and lubed with LLA.
Polly measured in grains
FPS............High.........Low..........Av....... ... SD
No Fill........1364........1324.........1347...... 40.15
.5 Fill.........1347........1322.........1335...... 24.74
1 Fill..........1336........1305.........1317...... 30.72