Bmag accuracy issues

I have a Bmag that I bought some years back and never really shot it, about 6 months ago i got it out and decided I'd set it up and get the new scooe I'd bought for it shot in. It didn't take but a few shot for the warning lights and buzzers to start going off. What the crap is the deal? I'd be better off hand throwing the bullets at the target. Was there a issue with these rifles or is it caliber specific issues?
I have a few other Savage rifles and they're all tack drivers but this one is terrible.

I have a B-mag and it only likes Winchester 25 grain. To be honest, the stock is a bit flimsy and the bolt cocking on the closing is weird, but I can usually get 5 shot 1 inch groups from a rest and rear bag. I use it to hunt hogs in the south during the small game season here on public land.