Post by Richard on Jan 1, 2020 19:03:43 GMT -5
Some more playing with 8208 and 4895…
Starting with a clean bore (mind you, that is one damp patch in and out on both side and one dry patch in and out on both sides --- If you want to call that clean?) My fouling load was the 300 grain Speer Deep Curl and 91 gr. of 8208 for an average velocity of 3,000 fps with a 14 fps ES and a 1.051 four shot group. (at 100 yards)
The second group was the 353 AeroMax Hard Cores with 89 gr. of 8202, Three shots at 100 yards gave me 2863 fps with a 7 fps ES and a .478” group.
Moving to 300 yards with the same charge I switched to the 350 AeroMax where five shots gave me 2883 fps with a 6 fps ES and three shots in .777” with all five in 1.639”.
Staying with the 350 AeroMax I switched to 91 gr. of H-4895 for 2877 fps and a 19 fps ES. The five shot group was terrible at 2.183” Last week this same combination grouped 2.156” for five shots with a 22 fps ES.
Switching back to 8208 at 91 gr. I dropped back to the 325 AeroMax for 2972 fps with a 20 fps ES but at 3 shot .593” and a five shot 1.480”
My last group with 91 gr. of 8208 and the 300 gr. AeroMax gave 3008 fps with a 14 fps ES. It put one, two and three in .645 and all five in 2.324”. There was some left to right wind (which I was trying to monitor on my wind flag) but #4 might have “escaped” to open up the five shot group.
As can be seen, IMR-8208 just seems to be working better with all three weight AeroMax bullets I shot.
Starting with a clean bore (mind you, that is one damp patch in and out on both side and one dry patch in and out on both sides --- If you want to call that clean?) My fouling load was the 300 grain Speer Deep Curl and 91 gr. of 8208 for an average velocity of 3,000 fps with a 14 fps ES and a 1.051 four shot group. (at 100 yards)
The second group was the 353 AeroMax Hard Cores with 89 gr. of 8202, Three shots at 100 yards gave me 2863 fps with a 7 fps ES and a .478” group.
Moving to 300 yards with the same charge I switched to the 350 AeroMax where five shots gave me 2883 fps with a 6 fps ES and three shots in .777” with all five in 1.639”.
Staying with the 350 AeroMax I switched to 91 gr. of H-4895 for 2877 fps and a 19 fps ES. The five shot group was terrible at 2.183” Last week this same combination grouped 2.156” for five shots with a 22 fps ES.
Switching back to 8208 at 91 gr. I dropped back to the 325 AeroMax for 2972 fps with a 20 fps ES but at 3 shot .593” and a five shot 1.480”
My last group with 91 gr. of 8208 and the 300 gr. AeroMax gave 3008 fps with a 14 fps ES. It put one, two and three in .645 and all five in 2.324”. There was some left to right wind (which I was trying to monitor on my wind flag) but #4 might have “escaped” to open up the five shot group.
As can be seen, IMR-8208 just seems to be working better with all three weight AeroMax bullets I shot.
Beats the Be-Jesus out of me?..........was it wind?.......more question marks but a good possibility as #5 more or less came back into the group. The rifle along with Kyle's bullets is definitely capable of averaging under an inch at 300 yards......but other things subsequently factor in.