Currently three Number One's live in my gun safe. One rifle that was particularly problematic was a 257 Roberts #1B. Basically, went to " go to" load for the other Roberts here-a mistake. This mess was a no-brainer. The load was with IMR4350 and the 87gr, Sierra. Turns out the rifle had a throat so long if barely missed a freebore. Went to a 100 gr. bullet with IMR 4350 seated out short of the lands. Daylight and dark. Not too long ago made up loads with Varget and 117 Hornady bullets, Both combination worked very will. Will continue with the 100 gr+ bullets. The #1H 375 H&H and the #1 A in 30-06 also do well. All three are, to some degree, finicky but do very well with appropriate loads. Did finally get some decent groups with the 87gr, Sierra. The bullet appeared to be seated in the case an eighth inch. These rifles are unmodified. There's no way that #1B is a dual purpose rifle. These are not bench rest rifles. YMMV
