For those who have this or looking at it vs the other 6.8 line necked to 6mm.
I built this AR15 strictly for coyote and wanted a 6x6.8 or (6x43), this is the 6.8 straight necked down to 6mm w/no shoulder changes last week using all parts for the upper from Joe Bobs and the 22" 1/10" P3 barrel from BHW. This has more punch over the .223 & 6x45 and fills the gap between my 6x45 & .243 rigs.
Last Sunday I ran 49 rounds of mixed loads and was not happy w/the results at the range or the new BHW barrel. I never had a new barrel shotgun my loads no matter how slow/fast or what bullets they were.
I had to look at it being due to the fact of very little or no load data for this cartridge w/the 55/58/65g/80g bullets.
I loaded up another 100 rounds (20 different loads) using various powders I have on hand and what a change
All my COLs were 2.270"
Remington brass, cci 200 primers.
NOT one single issue w/pressures, primers ALL were nice & rounded, no bolt or extractor marks at all.
Do not use these powders as they are way to slow at 30-31g:
Superperformance
CFE223
I used them so I figured to give em a shot, even though I knew they were slow.
Good powders & speed depending on charge using 55/58/65g bullets.
W748.........3048-3214fps
Benchmark....3318-3413fps
H335.........3130-3199fps
xbr8208......3104-3208fps
Varmint pro..3141-3185fps & some of the best groups.
Odd one:
BLc2 only gave 2886 fps w/31g, 55g nosler CT bullet BUT gave 3431 fps w/the 58g vmax at 30.5g????
My best group was w/31g w748, 65g vmax, 3214fps @ .377"
I dumped 8 loads and will change 12 others in weights.
Some groups were .377/.467/.627/.577/.957/ and about 10 over an inch. Wind was at 15-23 mph, 32-43* & sunny.
I built this AR15 strictly for coyote and wanted a 6x6.8 or (6x43), this is the 6.8 straight necked down to 6mm w/no shoulder changes last week using all parts for the upper from Joe Bobs and the 22" 1/10" P3 barrel from BHW. This has more punch over the .223 & 6x45 and fills the gap between my 6x45 & .243 rigs.
Last Sunday I ran 49 rounds of mixed loads and was not happy w/the results at the range or the new BHW barrel. I never had a new barrel shotgun my loads no matter how slow/fast or what bullets they were.
I had to look at it being due to the fact of very little or no load data for this cartridge w/the 55/58/65g/80g bullets.
I loaded up another 100 rounds (20 different loads) using various powders I have on hand and what a change
All my COLs were 2.270"
Remington brass, cci 200 primers.
NOT one single issue w/pressures, primers ALL were nice & rounded, no bolt or extractor marks at all.
Do not use these powders as they are way to slow at 30-31g:
Superperformance
CFE223
I used them so I figured to give em a shot, even though I knew they were slow.
Good powders & speed depending on charge using 55/58/65g bullets.
W748.........3048-3214fps
Benchmark....3318-3413fps
H335.........3130-3199fps
xbr8208......3104-3208fps
Varmint pro..3141-3185fps & some of the best groups.
Odd one:
BLc2 only gave 2886 fps w/31g, 55g nosler CT bullet BUT gave 3431 fps w/the 58g vmax at 30.5g????
My best group was w/31g w748, 65g vmax, 3214fps @ .377"
I dumped 8 loads and will change 12 others in weights.
Some groups were .377/.467/.627/.577/.957/ and about 10 over an inch. Wind was at 15-23 mph, 32-43* & sunny.
