Took the .308 CZ550 out for a spin. All data is for 100 yards. Temperature of 29 degrees. No wind.
Using:
Speer 165 gr. boattail
Win. WLR primer
R-P brass 2x fired trimmed to 2.010 and neck sized
46.0 gr. BLC2
Overall cartridge length: 2.800″
Four shots: 1.5″ Remove flyer: 1″
Four shots: 1 15/16″
Four shots: 1.6″ – remove flyer: 1″
Four shots: 1 3/4″
Four shots: 1.5″ – remove flyer: 3/4″
BLC2 has a rep for being temperature sensitive. I wanted to try some just to see how it goes.
Next group:
Speer 165 gr. boattail
Rem 9 1/2M primer
R-P brass new trimmed to 2.010 and full length sized
46.0 gr. Varget
Overall cartridge length: 2.800″
Three shots – 1.25″
Three shots – 1.50″
Five shots – 1.75″, discount flyer – four into .75″
The Varget seems to be the way to go. I need to get a premium bullet (Sierrra MK or Lapua, although Im thinknig about trying the Hornady SST) and some much better quality brass (Either Lapua or Horn. match or Norma)
Out of curiosity, for supposed temperature sensitive powders, have you ever compared the performance four rounds at ambient cold temperature with four rounds kept warm in your pocket?
see how it prints with the SMK 175 gr. If a 308 won’t print with that, it generally won’t print, period.
Culling flyers, unless they are called, doesn’t help accuracy testing.
atek3
Not yet. Im still looking for a good load to use as baseline.
Theyre called. Its one of those zen moments right after the gun goes bang but before the bullet hits where you just go “Ah!!!”
I was thinking just comparing the same load, one set of 4 cold, one set of four at body temperature.