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Any loading advice on using IMR4198 on 350gr and 405gr laser cast bullets in 18" 1895SBL?

Ones I've found from internet provide data on 24" 1895 using IMR4198:

350gr
start grain - 22.0
FPS - 1150
max grain - 30.0
FPS - 1483
OAL - 2.530

405gr
start grain - 22.0
FPS - 1125
max grain - 31.0
FPS - 1515
OAL - 2.530

Primary concerns are accuracy and leading.
 

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I have not started loading cast lead bullets, but have been doing a lot of reading in preparation for the same. According to Richard Lee the answer to your primary concern depends on the compressive strength of your lead. The strength of your lead should be about 10% less than the psi of your load for best accuracy without leading. This is fully explained in "Modern Reloading vol 2". I'm eager to hear what some of the experienced cast lead reloaders have to say about this as I'm trying to learn myself.
 

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Your other concerns should be position sensitivity and wide spreads in velocity. With minimum charges of 4198 with cast bullets......you'll get both.
 

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Well, for the 350'gr I use 30gr IMR-4198 as my "plinker" load, it's great on the range and for target. I wouldn't start at 22gr's, thats a very mall amount, I'd go minimum 26gr without a filler. LOWEST I've gone is 24gr and that was in my Sharps using a 630gr bullet(the bullet takes up a LARGE portion of the case). Same with the 405gr, I'd start at minimum 26-28gr for range work, but for "hunting" you will want to go up to 36-39gr's of IMR'4198. Start low and work your way up. I'll tell ya, you start shooting 38gr's of IMR-4198 your shoulder will begin letting you know you are shooting something :) It's not bad really, at 38gr's you should be up around 1400fps(give or take), you can actually go up to 60gr's depending on who's manual you look at, but before you hit 40gr's of powder you'll want a gas check or you will start leading up your barrel. All of these loads are using IMR-4198.
 

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Well, for the 350'gr I use 30gr IMR-4198 as my "plinker" load, it's great on the range and for target. I wouldn't start at 22gr's, thats a very mall amount, I'd go minimum 26gr without a filler. LOWEST I've gone is 24gr and that was in my Sharps using a 630gr bullet(the bullet takes up a LARGE portion of the case). Same with the 405gr, I'd start at minimum 26-28gr for range work, but for "hunting" you will want to go up to 36-39gr's of IMR'4198. Start low and work your way up. I'll tell ya, you start shooting 38gr's of IMR-4198 your shoulder will begin letting you know you are shooting something :) It's not bad really, at 38gr's you should be up around 1400fps(give or take), you can actually go up to 60gr's depending on who's manual you look at, but before you hit 40gr's of powder you'll want a gas check or you will start leading up your barrel. All of these loads are using IMR-4198.
I agree100% except I used H4198 and 39 grn gave me 1650 fps with bad groups, but 37 and 38 grns shot one jagged hole at 1450-1550fps with a modest Lee Factory Crimp. This was out of my Guide Gun =18 1/2 " barrel.
'
 

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1895CB IMR4198.jpg
Bottom one (red) 3 shots was first week. Second week (white) 4 shots was windy causing target to rock back & forth.
 
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