My entire .25 cal. bullets inventory is just five bullets:
Nosler 100 BTip
Nosler 85 BTip
Sierra 87
Sierra 75
Bib 88
To evaluate a new or unknown gun for either accuracy potential or problems, I start right out with the Sierra 75's. If a .25 won't shoot this bullet, you've got issues.
I did the development for Randy on the BIB 88's....the first ones down any barrel. All I had was my 250 Ackley huntin' rig but it sorted 'em out nicely as these 5 shot groups show.
250 Ackley (below)