Experienced handloaders and QuickLoad guys, please weigh in!
Went to the range to chronograph a new .308 bullet/powder combination; and two .223 bullets with a new jug of powder. The session ended quickly when all early results -- the lightest of the five charge weights per load that I prepared, I know to "work up" -- yielded much more velocity than expected.,The PACT chronograph was working fine, as results with some factory loads were typical.)
Would be obliged if you'd look over my data here and advise on new charge weights to try at the next range session.
Conditions
Sea level, 65 degrees F
.308
Rifle: G.A. Precision custom M700, 24" Rock Creek,a.k.a. Mike Rock) 5R barrel.
Load: 155-grain Lapua Scenar bullet; CCI-BR primer; Winchester case; 2.83" OAL,magazine fed); IMR4895 powder @ 46.3 grains » 3,000 fps chrono average
Question: My target velocity for this load is 2,900 fps ... given the above, what charge weight of this lot of IMR4895 would you recommend to achieve this? So, need to knock 100 fps off.
.223
Rifle: G.A. Precision custom AR-15, 20" Rock Creek,a.k.a. Mike Rock) 5R barrel.
Load #1: 77-grain Sierra MatchKing bullet; CCI-BR primer; Lake City case; 2.260" OAL,magazine fed); Varget powder @ 23.5 grains » 2,840 fps chrono average.
Q: My target velocity for this load is 2,750 fps ... given the above, what charge weight of this lot of Varget would you recommend to achieve this? Again, basically need to knock off 100 fps.
Load #2: 80-grain Berger bullet; CCI-BR primer; Winchester case; 2.360" OAL,single feed); Varget powder @ 23.5 grains » 2,820 fps chrono average.
Q: My target velocity for this load is 2,750 fps ... given the above, what charge weight of this lot of Varget would you recommend to achieve this?
Thanks in advance for your help.
Regards,
mib2000
,Note: I put up a similar post on another firearms board, as I'm hoping to move forward and hit the range again ASAP.)
Went to the range to chronograph a new .308 bullet/powder combination; and two .223 bullets with a new jug of powder. The session ended quickly when all early results -- the lightest of the five charge weights per load that I prepared, I know to "work up" -- yielded much more velocity than expected.,The PACT chronograph was working fine, as results with some factory loads were typical.)
Would be obliged if you'd look over my data here and advise on new charge weights to try at the next range session.
Conditions
Sea level, 65 degrees F
.308
Rifle: G.A. Precision custom M700, 24" Rock Creek,a.k.a. Mike Rock) 5R barrel.
Load: 155-grain Lapua Scenar bullet; CCI-BR primer; Winchester case; 2.83" OAL,magazine fed); IMR4895 powder @ 46.3 grains » 3,000 fps chrono average
Question: My target velocity for this load is 2,900 fps ... given the above, what charge weight of this lot of IMR4895 would you recommend to achieve this? So, need to knock 100 fps off.
.223
Rifle: G.A. Precision custom AR-15, 20" Rock Creek,a.k.a. Mike Rock) 5R barrel.
Load #1: 77-grain Sierra MatchKing bullet; CCI-BR primer; Lake City case; 2.260" OAL,magazine fed); Varget powder @ 23.5 grains » 2,840 fps chrono average.
Q: My target velocity for this load is 2,750 fps ... given the above, what charge weight of this lot of Varget would you recommend to achieve this? Again, basically need to knock off 100 fps.
Load #2: 80-grain Berger bullet; CCI-BR primer; Winchester case; 2.360" OAL,single feed); Varget powder @ 23.5 grains » 2,820 fps chrono average.
Q: My target velocity for this load is 2,750 fps ... given the above, what charge weight of this lot of Varget would you recommend to achieve this?
Thanks in advance for your help.
Regards,
mib2000
,Note: I put up a similar post on another firearms board, as I'm hoping to move forward and hit the range again ASAP.)
