I went to sight something in (benefits of open access, on my own time, sorry @Tempestman - it was last minute decision and I needed both 25m and 50m ranges) and I was using 3 types of ammo, from my Ruger American Compact with PARD NV008 night vision scope.
- Some bulk Bushman supersonic.
- Some Federal bulk supersonic.
- Winchester subsonic.
Something to note, the scope mount has some flex in it, just how it is and nothing I can do about it. It’s a hunting NV scope, so there’s that. It’s not a precision scope. That said, I did get some very good results with it, so I discounted the scope as an issue (I will do scope review later).
Rifle is sighted to 25m.
Never grouped well with Bushman.
Groped very well with Federal.
The other day, I decided to take it out to 50m.
Subsonics grouped very well.
Bushman so, so with a lot of fliers and I am sure as shit it wasn’t me…
Federal looked like a shotgun pattern.
Overall all, subsonics did very well at 50m and neither of the supersonics did well at all at 50m.
A wild theory that I can think off is impact to consistency due to a combination of cheap ammo which then translates to bullets going transonic before 50m and destabilising in flight, which is out there, but that’s the only thing I can think off (other than my gun hates that ammo, but did group with Federal).
Another clue, could be that Federal failed to cycle well in semi-auto action on Ruger MkIV (reasonably heavy bolt), but cycled well in a different gun with very lite bolt. While Bushman always cycled well, I just don’t think my Ruger American likes them.
Next thing to do is try high velocity 22s, maybe CCIs (they did okay as well at 50m) and maybe couple of boxes of different premium target brands.
Anyway, transonic is my theory, to explain 25m groups but not 50m, because I don’t think gun hates Federal that much at all (at 25m). Discuss (please).
@Tempestman you may be interested in this.