Has anyone used a CBB 70gr bullet with the 5.56x42 for deer hunting?
I've used Tac6, Tac30, 6.5CM and 6.8. All ARP builds. Thinking seriously about trying the X42. I'd be very interested in seeing a gel test with the 70 MKZ.I have not so far,, But it could be an option.
6.5 CM - 143gr ELDX
270 AR - 120gr MKZ
30 Herrett / TAC 30 - 125gr MKZ
6.8 - 105gr MKZ
257 Bobcat - 100gr NBT
5.56x42 - 70gr MKZ....
5 tags to fill... decisions, decisions.
Found a load using CFE 28.6 2.200 /1.847 with a comparator in a Hornady case manufactured by S&B. Three shot group into a cloverleaf hole. 20" barrel 1:7.7 temp was 73 3066 fps. No pressure signs. Going to go up a little higher in charge weight.Xman / Chris -
I tested Roberts V2 prototype 70grn MKZ in my 5.56x42 with 20" Kreiger 7.7 twist from Harrison.
AR Comp 25.5gr - 3051fps - 0.943" at 100yds.
AR Comp 25.7gr - 3071fps - 0.967" at 100yds.
OAL 2.215" Temp 50 degrees.
Also ran CFE223 at 29.5 and 29.7gr - at a little more than 3160fps.
Did not show pressure on cases but no accuracy 2.67 to 3.070" at 100yds. Do not recommend CFE at this level.
Did not retest either ARC or CFE at length other than 2.215" OAL.
Found a load using CFE 28.0 2.220 in a Hornady case manufactured by S&B. Three shot group into a cloverleaf hole. 20" barrel 1:7.7 temp was 64° and 3136fps. No pressure signs. Going to go up a little higher in charge weight.