Shooter264
Well-Known Member
Tagging back in, accidentally hit the unsubscribe link
Well guys I finally found time to do some more velocity testing today. The weather was tolerable for a change so GoodGrouper and I hit the range for another session with the 6.5 BPX.
WE started out with IMR 4831-- Temp in the mid 40's and a right to left breeze @ 2 mph
47.5gr---2954 and 2958 fps --- ( 1 fouler )
48gr-----2994 fps
48.5gr---3028 fps
49gr-----3061 fps
The first two went into .120 then the third, fourth and fifth moved up and right about 1/4" but the next three went into a .101 . The last shot was starting to show a bit of pressure so I didn't shoot the rest of the string. This powder appears to be another good candidate!!
Next up--- H 4831
48.5gr---2895fps
49gr-----2916 fps
49.5gr---2929 fps
50gr-----2949 fps
50.5gr---2985 fps
51gr-----3024 fps
This was a disaster!! I shot the string with a loose Brake !! STUPID !! Old Age, LOL
I don't think this would be the powder anyway, with the way others have shot, but it deserved a better chance than I gave it!!
Next up --- RL19
48gr-----2937 fps
49gr-----2972 fps
49.5gr---3013 fps
50gr-----3037 fps
50.5gr---3070 fps
51gr-----3090 fps
Rl 19 showed some decent shot clusters but not like some of the others accuracy wise but the velocity was amazing!! The last shot was showing a little pressure but not bad. 51gr was 100% filled.
Next up --- RL22
49gr----- 2997 fps
49.5gr---3012 fps
50gr----- 3059 fps
50.5gr---3071 fps
51gr----- 3101 fps
Good old RL22!! First three shots went into .214 !! This load window will be hard to beat. Never found pressure but no matter since I couldn't get another tenth of a grain in there anyway.
We learned today, that this bbl with this cartridge does not want to be shot at velocities exceeding 3060 or so. You can see it in the higher velocity groups.
I thought that a couple of these powders would be too slow for my little case but I found out different today. I think shortened cases with less taper have a tendency to alter burn rates. I believe it's due to less powder kernels in contact with the brass case making a more efficient burn!!
I'll see if I can get Steve to post some pictures of the groups tomorrow. Thanks for taking another look at our Thread. Hope you are enjoying our efforts. ---- RHB
Thanks Rich, I suspect your case is at least 10 grs larger in capacity and proportioned similarly so I'm betting it will be plenty fast!!! RHB
If it is going to be a one holer at 3050fps we will probably need Goodgrouper to do the shooting!!!