rc109a
Member
I was able to try out the 80g PSP and H322 with the following results (all were only 5 shot groups)
21.5g= 1.1" groups
23g= 1.90" groups
24g= 2.62" groups
I had five rounds of 24g left and the shooter next to me wanted to see the round chrony, so here are the results (18" SS barrel with 1:9 twist):
2628.1
2656.0
2623.0
2695.4
2623.8
Average 2645.3 with a difference of 72.4 FPS
I am not sure what this other data means (If you know what that data is please let me know. I am always trying to learn something new):
SD: 31.1 (standard deviation?)
CV: 1.18%
MAD: 24.4
CV: 0.92%
I did try out the 100g Sierra BTSP with 19g H322 and got 1.4" groups.
Some of the problems I had was bumping the shoulder while seating the bullet with the 80g PSP on some of the brass. This did not stop most from chambering, but a few did. I did not have this problem with the BTSP. Not sure why this was happening. Any ideas?
I am leaning towards the BTSP at 100g, but there is a lack of data for this round. Does anyone have any that they are currently using?
Thanks...
(and yes, I have posted this same question in another boards)
21.5g= 1.1" groups
23g= 1.90" groups
24g= 2.62" groups
I had five rounds of 24g left and the shooter next to me wanted to see the round chrony, so here are the results (18" SS barrel with 1:9 twist):
2628.1
2656.0
2623.0
2695.4
2623.8
Average 2645.3 with a difference of 72.4 FPS
I am not sure what this other data means (If you know what that data is please let me know. I am always trying to learn something new):
SD: 31.1 (standard deviation?)
CV: 1.18%
MAD: 24.4
CV: 0.92%
I did try out the 100g Sierra BTSP with 19g H322 and got 1.4" groups.
Some of the problems I had was bumping the shoulder while seating the bullet with the 80g PSP on some of the brass. This did not stop most from chambering, but a few did. I did not have this problem with the BTSP. Not sure why this was happening. Any ideas?
I am leaning towards the BTSP at 100g, but there is a lack of data for this round. Does anyone have any that they are currently using?
Thanks...
(and yes, I have posted this same question in another boards)