benEzra
Moderator Emeritus
I know, I know, you guys are going to give me grief for benchresting a SAR-1. But I'm trying to get my QD scope sighted in "just right" and some benchrest-induced inconsistencies are making it a little tough.
I have a SAR-1 with a siderail-mount POSP 4x24 scope--fantastic optics, by the way, especially considering the small objective lens. Anyway, the POI changes dramatically depending on how the rifle is benchrested, and I suspect vibrations from the initial op-rod acceleration are the culprit. I know that with my mini-14, resting the gas block (rather than the stock) on the sandbag cuts group size nearly in half, so I was wondering where the analogous "sweet spot" is on an AK-pattern rifle.
First, it HATES plastic clip-on-style bipods, bouncing at least 3" off the bench during every shot; groups are way worse than even offhand (shots scattered high). It does better with sandbags (Hoppes benchrest with front bag and rear bag under rear of stock), but some days a lot better than others, and slight differences in grip tension and cheek weld seem to make for a large POI shift. Sometimes, I actually get better groups shooting offhand than off the benchrest; is this common? Is prone any better? (I haven't tried it, but I do have some shorty magazines that would allow it.)
My sandbags are filled with corncob instead of sand, for lighter weight. Is this a problem?
I have a SAR-1 with a siderail-mount POSP 4x24 scope--fantastic optics, by the way, especially considering the small objective lens. Anyway, the POI changes dramatically depending on how the rifle is benchrested, and I suspect vibrations from the initial op-rod acceleration are the culprit. I know that with my mini-14, resting the gas block (rather than the stock) on the sandbag cuts group size nearly in half, so I was wondering where the analogous "sweet spot" is on an AK-pattern rifle.
First, it HATES plastic clip-on-style bipods, bouncing at least 3" off the bench during every shot; groups are way worse than even offhand (shots scattered high). It does better with sandbags (Hoppes benchrest with front bag and rear bag under rear of stock), but some days a lot better than others, and slight differences in grip tension and cheek weld seem to make for a large POI shift. Sometimes, I actually get better groups shooting offhand than off the benchrest; is this common? Is prone any better? (I haven't tried it, but I do have some shorty magazines that would allow it.)
My sandbags are filled with corncob instead of sand, for lighter weight. Is this a problem?