saz
09-27-2010, 12:29 AM
Well, I had another good day with the puma 454 today. That little cannon continues to impress me. I got some Hammer Boolits from another guy on here (a remake of the Lee 300 and weigh about 330 with a bigger meplat) and started working up with Lil' Gun- here are the results;
All loads were with Rem 7 1/2 primer and WW cases.
Last week I started at 21.5gr of Lil Gun with no accuracy at all. As I started going up in charge weight, the groups fluctuated between 2 and 4 inches at 50 yards until I hit the top Hodgdon recommended data (I used the cast performance 320gr I used for a baseline) at 24 grs. Once I hit 24gr the group (3 rounds) settled into about 3/4" at 50 yds with an average MV of 1742 fps. So this today I decided to see if it was just a fluke and loaded up 2 more 3 round batches at 24.5 and 25 grs- velocity went up , but not much and the accuracy went away. I also loaded 12 more rounds at 24grs, and I shot 1.2" and 1" 5 shot groups at 50. But the only thing was that I lost about 60fps. Last week it was 60 degrees and sunny, today it was 31. Does anyone know if Lil Gun slows way down on the cold? I didnt notice anything else slowing that much.
The next thing for me to try is a CCI 450 primer instead of the Rem 7 1/2. It will probably help in the cold.
All loads were with Rem 7 1/2 primer and WW cases.
Last week I started at 21.5gr of Lil Gun with no accuracy at all. As I started going up in charge weight, the groups fluctuated between 2 and 4 inches at 50 yards until I hit the top Hodgdon recommended data (I used the cast performance 320gr I used for a baseline) at 24 grs. Once I hit 24gr the group (3 rounds) settled into about 3/4" at 50 yds with an average MV of 1742 fps. So this today I decided to see if it was just a fluke and loaded up 2 more 3 round batches at 24.5 and 25 grs- velocity went up , but not much and the accuracy went away. I also loaded 12 more rounds at 24grs, and I shot 1.2" and 1" 5 shot groups at 50. But the only thing was that I lost about 60fps. Last week it was 60 degrees and sunny, today it was 31. Does anyone know if Lil Gun slows way down on the cold? I didnt notice anything else slowing that much.
The next thing for me to try is a CCI 450 primer instead of the Rem 7 1/2. It will probably help in the cold.