so i went back to the range to try and improve this load but it was a lot worst.
the first 2 targets are the ones from the other day.
i shot a 0.658 group with 94 gr.retumbo and a coal of 3.600
i also tried a coal of 3.650 as this shot the best with the TTSX 168.
that group was worst at 1.50"
so this morning i tried again.
i kept 94 gr. of retumbo for a charge and played with OAL.
the first group i made i still used 3.600 but with WLRM primers.
group was .937"
second group i kept 3.600 and CCI250 that gave me .658" the other day and used the 1st circle on my BDC reticle just to see how it would group compared to a crosshair. group was 1.19"
then i tried a group at 3.615" that was 1.82"
and finally a last group at 3.630" that was 2.25" .
now is it possible that such small changes in COAL make that much difference in group size?
you can see in the pics that group keep the same pattern but enlarging when i lenghten COAL.
can i go shorter than 3.600" with a 200 accubond in 300 rum? like 3.585"
the last 2 groups were shot 22 to 27 since i cleaned the barrel. is it possible that it's already fouled? i don't see groups beginning to open before 45 shots with the barnes TTSX.
velocity for the 12 shots were between 3052 and 3079. ave.3060 fps.
what would you do next?
should i try cleaning the barrel and a shorter coal (if possible to go below 3.600")
try a 10 shot group at 3.600?
that load is already not bad with 1 group at .658 and 1 at .937.
it's just that i was spoiled with the 168 ttsx shooting something like 15 - 3 shot groups between 0.37 and 0.82.
and 1-10 shot group where 7 of those were in .532" and the other 3 enlarged it to 1.36"
i'm hoping to be able to do the same with the accubonds
thanks in advance for the hints