c.r.
I chronoed some loads Sunday from my 5.5” M97 .44 Special. Outside air temp was 24 Deg F. The ammo was in the house (about 68 Deg F), and transferred directly to a warm truck. Took about 20 Min to get to the range. Ammo stayed in truck (not running), passenger side seat with door opened and closed to load each test batch. I shot each string pretty fast – the gun stayed warm.
300gr Keith .430, BHN 11 Mt Baldy Bullets 15.5 gr H110, 2x Starline, Win LP
Avg. 991 fps, Hi 1,031 fps, Lo 965 fps, ES 66 fps.
300gr Keith .430, BHN 11 Mt Baldy Bullets 16.1 gr H110, 2x Starline, Win LP
Avg. 1,047 fps, Hi 1,077 fps, Lo 1,029 fps, ES 48 fps.
255gr Keith (429421) .4285, BHN (Lyman #2 Equiv – seems softer to me) Western Bullet, 17.0 gr A2400, 2x Starline, Win LP
Avg. 1,220 fps, Hi 1,271 fps, Lo 1,186 fps, ES 85 fps.
255gr Keith (429421) .4285, BHN (Lyman #2 Equiv – seems softer to me) Western Bullet, 8.1 gr Power Pistol, 2x Starline, Win LP
Avg. 963 fps, Hi 978 fps, Lo 944 fps, ES 34 fps.
255gr Keith (429421) .4285, BHN (Lyman #2 Equiv – seems softer to me) Western Bullet, 10.2 gr HS6, 2x Starline, Win LP
Avg. 1,002 fps, Hi 1,049 fps, Lo 974 fps, ES 75 fps.
Some of the Extreme Spreads (ES) greater than I normally get. Don’t know if this is due to outside air temp, light conditions effecting chrono or
That’s the frustrating thing about chronos.
Some observations.
My current 8Lb lot of H110 is slower than previous lots I’ve chronoed. I wouldn’t go below 16.1 gr with the 300gr and this lot of powder might even kick it up .5 gr.
The recoil of the 300gr Keith/16.1 gr H110 was less than that of the 255gr Keith/17.0 A2400.
The 8.1gr of Power Pistol was a real pleasant load to shoot.
Paul