snuffy
Member
There seems to be a controversy about whether a piece of tumbler media left in a flash hole , then having a primer seated will have a bad effect on performance of a handload.
So I purposely tumbled de-capped, sized brass in corn cob media to get some with one chunk of it in the flash hole. From the same batch, some came out without the flash hole blocked. Leaving the FL die OUT of the first hole in my dillon 650, I proceeded to load 50 rounds.
The load is one that I have loaded thousands of, R-P brass, WC-844 powder at 24.0 grains, WW-sr primers, trimmed and FL sized,(but not in that order), Hornady 60 gr. V-max bullets.
The top two bullseyes are the two test groups. The two hits to the left of the right group were sighters. I was shooting 600 yds last Sunday, had to bring her back down. The group to the right of the center bull is where I was trying to get the chrono to register the bullets! Rifle is a bushy 20" HB, Nikon Monarch 5.5 X 14.5 AO
Now the chrono readings
Plugged
AV 2940
Hi 2953
LO 2929
ES 26.6
SD 11.6
AD 9.0
Unplugged
AV 2927
HI 2948
LO 2904
ES 44.7
SD 18.3
AD 14.9
To my way of thinking, the chrono said it didn't make any difference. Actually the plugged ones had a better ES and therefore SD But the target was double in size. I have some of each left, I'll run another test next time I go to the range. Right now, I think it does make a difference, in this particular load, rifle, and ammo combination on this day.
So I purposely tumbled de-capped, sized brass in corn cob media to get some with one chunk of it in the flash hole. From the same batch, some came out without the flash hole blocked. Leaving the FL die OUT of the first hole in my dillon 650, I proceeded to load 50 rounds.
The load is one that I have loaded thousands of, R-P brass, WC-844 powder at 24.0 grains, WW-sr primers, trimmed and FL sized,(but not in that order), Hornady 60 gr. V-max bullets.
The top two bullseyes are the two test groups. The two hits to the left of the right group were sighters. I was shooting 600 yds last Sunday, had to bring her back down. The group to the right of the center bull is where I was trying to get the chrono to register the bullets! Rifle is a bushy 20" HB, Nikon Monarch 5.5 X 14.5 AO
Now the chrono readings
Plugged
AV 2940
Hi 2953
LO 2929
ES 26.6
SD 11.6
AD 9.0
Unplugged
AV 2927
HI 2948
LO 2904
ES 44.7
SD 18.3
AD 14.9
To my way of thinking, the chrono said it didn't make any difference. Actually the plugged ones had a better ES and therefore SD But the target was double in size. I have some of each left, I'll run another test next time I go to the range. Right now, I think it does make a difference, in this particular load, rifle, and ammo combination on this day.