CZ527 carbine 7.62x39

[SHV]

that's St Mary's 50m indoor

[in2anity]

I've got a little for test, first tested on cut barrel No.4 MK 1, it spreads everywhere on A3 paper at 25 meters, never seen this kind of accuracy before, maybe due to the barrel is not suitable for this projectile and TB combination , on 527 should be fine, will test later

Sorry SHV what bullet is that? what's TBF150? aren't they Berry's?

[SHV]

Sorry SHV what bullet is that? what's TBF150? aren't they Berry's?

that's Berry's, not good on cut barrel long branch No.4 MK 1, have not tried it on Savage No.4 MK 1 and CZ527 yet

[in2anity]

that's Berry's, not good on cut barrel long branch No.4 MK 1, have not tried it on Savage No.4 MK 1 and CZ527 yet

Some of the LEs have trouble stabilizing certain bullets, especially the original two groove barrels. Shooters put it down to its lesser ability to grip the bullet. That’s why the boat tail bullets might not work as well as a flat base (of approx the same weight) - as the BTs have less bearing surface to work with combined with only the two grooves. The shorter bearing surface on those lighter Berrys bullets might therefore be suffering the same fate (they are 123gr right?).

Also another characteristic of the LEs is some don’t like a big jump to the lands - maybe the shorter Berrys bullet does not work well in this regard. Lots of anecdotes but my No4 certainly likes a long bullet seated out as far as possible.