Quoted: What grain of bullet are you shooting? What is the twist of the Hk33 barrel, 1in7? If you are using 55 grain ammo, they may not be stabilizing with that twist rate. A 1in7 needs 64 grain and heavier.
|
Actually, that's backwards...
55 grain will stabilize in most barrel twists; it's the heavy bullets that require faster twists like 1/9, etc. 55 grain is good from 1/12" (which my HK93, when I had it, was rifled with) to 1/7. In fact, 1/7 almost over-stabilizes...lighter bullets might literally fly apart from that fast a twist. 1/9 will stabilize both 62 grain and 55 grain, but 1/12 won't stabilize 62 grain.
55 grain (standard M193 ball, and most civvie loadings) should be just fine for you. I shoot that exclusivly, out of everything, including my 1/7" M4gery. All my 100 yard groups are at least minute-of-pie-plate offhand.
If it's hitting the target (if it hits it) keyholing...it could be that it's bouncing off the faux flash supressor, or perhaps the crown, or other part of the barrel, is damaged.
I'd send it back to Vector with a test target, shot while the rifle was on a rest, and demand they make it right. For any "Factory" rifle to do this out of the box is pretty unacceptable...
Just my $0.02.