Gentlemen,
Greeting. Just want to share my yesterday's attempt in SPFGA, Edmonton. I think I made it.
Rifle specs - AI AWP factory rifle in 308, no modification
Scope spec - Kahles 10-50x60 DD reticle
Load spec - 42.0 N140/Federal#210M/Lapua brass/155 SMK
OAL:0.015/0.030/0.045/0.060/0.075/0.090 off land
Distance - 100 meters
File 2016-10-20, 10 05 01 PM.jpg
File 2016-10-21, 9 32 03 AM.jpg
Measurement: 0.523 -- 0.637 -- 0.611 -- 0.574 -- 0.630 -- 0.869
Group size: 0.194 -- 0.293 -- 0.270 -- 0.238 -- 0.287 -- 0.494
Group size calculate formula: (measurement-0.299)/1.1/1.047 (0.299 is the actual hole size for 308 Winchester caliber)
Three things need to mention,
1. This paper is from my load development, so the OAL(s) are vary.
2. For the last group, actually it's my fault, my support hand was so tired that it loose so quick, which cause a very bad follow through. anyway, excuse is excuse. the good thing is I passed it.
3. OCW should be 45.7gr and 39.2gr, not the one used in this attempt(42.0gr). Actually I suspect 42.0gr is its scatter node. I can update my ladder test result(in 300m) if anyone interest.
Cheers,
Dongbin