ripcurlksm
FNG
Two questions shooting Federal Ascent 308 175gr on my chrono this month--
1) At 200 yd distance starting top to bottom, here is my cold bore shot (2660fps at muzzle), 2nd shot (2642fps), 3rd shot (2626). Could a 16-18fps difference between each 3 shots cause this much drop at 200 yards?
2) Here are two range trips with chrono data, my battery died in Nov so only got three shots recorded. Same rifle, same ammo (Federal Ascent 308 175gr), same gun range. The only difference is on 11/12 the conditions were 54*F @ 30.06 inHg and on 12/9 was 28*F @ 30.39 inHg. Could this 26 degree temperature and .33 pressure delta cause such a difference in muzzle velocity?
1) At 200 yd distance starting top to bottom, here is my cold bore shot (2660fps at muzzle), 2nd shot (2642fps), 3rd shot (2626). Could a 16-18fps difference between each 3 shots cause this much drop at 200 yards?
2) Here are two range trips with chrono data, my battery died in Nov so only got three shots recorded. Same rifle, same ammo (Federal Ascent 308 175gr), same gun range. The only difference is on 11/12 the conditions were 54*F @ 30.06 inHg and on 12/9 was 28*F @ 30.39 inHg. Could this 26 degree temperature and .33 pressure delta cause such a difference in muzzle velocity?
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