6.5x55 load testing

[JeffreyDeGraff]

Rifle is a CZ550

Bullet - 140gr Sierra SPBT
Case - Winchester
Primer - Remington 9 1/2
COAL - 3.604” with comparator
( .010” off lands)
Powders - H1000 52.0gr
RL22 46.5gr
H4831 47.0gr


RL22 was the best by a little bit. 1.238”. Going to try playing with the powder charge to try and tighten the group. When I find the powder charge I’m going to play with the seating depth.


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[muforester]

Rifle is a CZ550

Bullet - 140gr Sierra SPBT
Case - Winchester
Primer - Remington 9 1/2
COAL - 3.604” with comparator
( .010” off lands)
Powders - H1000 52.0gr
RL22 46.5gr
H4831 47.0gr


RL22 was the best by a little bit. 1.238”. Going to try playing with the powder charge to try and tighten the group. When I find the powder charge I’m going to play with the seating depth.


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I have a CZ550 6.5x55. I shoot 140gr AMAX. My most accurate powder was IMR 4064. PPU brass, CCI LR primers, and bullet seated to Hornady loading specs.

Now I have went to 155gr Lapua Mega bullet, Lapua brass, Norma MRP powder, CCI primers. Very accurate

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[Wolfdog]

My go to powder in 6.5x55 with 140 grain bullets is IMR 4831.

[JeffreyDeGraff]

I went back to the range today with the same 140gr Sierra SBT. I tried IMR4064 (38.0gr), that muforester recommended, and IMR4895 (38.0gr). Seating depth was kept the same.

The high shot was out of a cold clean barrel, the other 4 were sub MOA.





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