to follow up my post from last night:
First off - all loads listed worked in my gun but should be approached with caution in other guns. I make no claims for safety.
for the 180 gr Hawk I have used 44 to 45 gr of Rx 7, CCI 200 primer, WW brass to get about 2500 fps but there was a 126 fps range from hi to lo in a 5 shot string - maybe not enough crimp. No record on accuracy.
180 Hawk, 52 to 52.5 gr IMR 4895, CCI 200, WW brass gave about 2400 fps and good accuracy.
Some folks have warned that the soft jackets of Hawk bullets require one to approach max loads with caution so I have been cautious.
for 200 gr Hornady
I tried H and IMR 4831 but got low velocities and went to:
200 Hornady, 59.5 IMR 4350, CCI 200 or Win large Rifle, WW brass for 2300 to 2400 fps and fair to good accuracy.
200 Gr Hornady, 52 to 53 gr IMR 4895, CCI 200, WW brass, for 2400 to 2450 fps and good accuracy - mild shooting.
200 Gr Hornady, 61 gr H450, CCI 200, WW brass, no chrono but noted better accuracy than 60.5 gr of H 450.
200 Horn 43gr Rx7 Fed 210, WW brass, chrono 2343 accurate at 50 yds
New (1991) Factory Win ammo, 200 gr silvertip chrono 5 rounds at 30F 2281-2365 avg 2324, accurate, from 24 inch bbl, original mod 71 dlx. (same rifle used for all data here).
220 gr bullets - I think this is a great bullet wt in this cartridge.
220 Speer (old stock I found) 54.5 gr IMR 4350, CCI 200, WW brass - mild and accurate, no chrono work.I'm hoarding these bullets until I find a good load for 220 Barnes then will try the speers.
220 Barnes Original, 56.5 IMR 4350, CCI 200, WW brass 4 rounds chrono 2207-2267 avg 2237 I noted that I might try a little more powder.
220 Barnes O, 63 gr AA 3100, CCI 200, WW brass chrono avg 2326 and good accuracy for me (2.5 in at 75 yds iron sites)
250 gr bullets _ Jacketed
250 Barnes originals 53-54 gr of IMR 4350, CCI 200, WW brass, gets about 2150 fps and good accuracy (2.5 " at 75 yd).
250 Hawk 57- 58.5 gr H 4831, CCI 200, Rem or WW cases chrono at 1919 to 2120 fps with ok accuracy - like 58.5 gr and WW cases better. Rem cases were real old but unfired.
250 Barnes O (old style) 45.5 to 46 gr of H 4895, CCI 200, WW cases chrono 2170 and good accuracy - I note to add .5 gr to the 46 gr load as it seemed mild. Also noted to be careful with case trimming, overall cart length and bullet seating depth.
250 Barnes O, 59 gr AA3100, CCI 200, WW brass chrono 2161 for 6 shots no accuracy notes.
CAST bullets
250 g cast CG Doudna cast NEI mould 59.5 g H 4831, CCI 200, WW brass, chrono 2021 to 2061 at 35 F good accuracy at 2 inches at 75-80 yds.
250 gr cast GC (2 different moulds, Doudna and unknown), 57.5 to 59.2 AA 3100, CCI 200, Rem cases chrono avg 2018 to 2116 best accuracy at 59 gr. (1.5 " at 75 yds).
Favorit cast 250 load
250 gr gc (Doudna cast) 58.5 IMR 4831, CCI 200, WW brass, chrono at 2138 fps and 2.5"at 75 to 100 yds.
OTHER LOADS
From my BC Canada buddy:
250-260 gr cast (NEI mould) 56 gr R19, 8 gr PSB filler, Rem 9.5, WW brass- chrono 2150- Barry is sold on the PSB filler. I haven't tried it yet.
or
250-260 gr cast, 60 gr R19, 6 gr PSB filler, - no primer mentioned - probably Rem 9.5, and WW brass.
He says to be sure there is no air space in the cartridge when using the filler.
In all loads with the 348 watch for case stretching and keep overall cart length so that bullets don't jam on the rifling. Especially with cast loads that you might not fire. I once had a bullet stick in the barrel when I ejected the unfired case - a mess of powder in the gun and potentally dangerous if I'd tried to lever in another load and fired - probably would have had a jam before firing but one must be careful.
HTH
Dan