I know. I was going to load up some 40 grain varminters and see if those stabilized but I never got around to it. I lost interest in the gun and, since you’re giving up all that velocity with the short barrel anyways, why not just let it key hole?
At under 50 feet you are right keyhole probably makes no difference. My 10.5” 6.5 grendal on the other hand with a 1:6 twist shoots single hole groups at 100m looking like 3 leaf clovers at worst off the bench with 140gr nosler Brown tips. The only reason I shoot 140s is I also load them into my 6.5 creedmoor AR10 which with the 24” stainless helical flutes is also a tac driver. The smaller grendal is my go to deer stand gun it’s handy and laser beam accurate too 200m which is twice what the sight lines are at the lease.