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I wouldn't worry about the bullets being too soft. I use 18 or 20:1 lead and tin and get very good accuracy from my 45-70. Others use alloys down to 30:1.
Grouch

My rolling block really likes Saeco's 425gr spire point mold cast of 18:1 lead and tin. It's produced many groups under 1" at 100yds with good iron sights. Once 4 consecutive 5 shot groups that...

For what it's worth,I suspect, given the normally slow twist rates in 45-70 you should get about any velocity you really want or need with something like 20:1 lead and tin, and often with better...

The best information I have is that you need more antimony than tin to quench from the mold or heat treat. Otherwise the alloy will soften given enough time. I haven't tried to harden 20:1, so can't...

+1 for what Larry said. Hard cast tends to be over rated. 16:1 should easily achieve 1600 or more, especially in the relatively slow twist usually seen in 45 - 70. Good luck!
Grouch

I agree with the previous poster who suggested a softer alloy. My Rolling Block shows a decided preference for 18:1 lead and tin over the wheel weights + 2% tin - maybe bumping up?
Grouch

I'd agree with the suggestion that you go back to 33.5 and 34 and try them again. It looks to me like you're close to a node(not much point of impact difference and good groups). Suggest you try...

Maybe see what Veral Smith at LBT has to say. According to Greenhill,your max length should be +/-1.3". LBT molds are cut to fit your rifle(and throat if you provide the information, and certainly...

Silverbulletsmith - If we're talking price, just be aware that CBE prices are Australian dollars, roughly 80 cents US.
Grouch

I use the CBE mold you mentioned with 23 gr of H414 in my 1915 '96 sized .267, it's the best of the 4 molds I have, good for 1" to 1 1/2" for 5 shots at 100yds. my bore dimensions are very close to...

Cast Bullet Engineering has several 6.5 molds, at least one casts .268.
Grouch

My only suggestion is that you might want to try a softer alloy. The old Winchester 45 90 ammunition box recommended 16:1 lead and tin, my 45 70 shoots extremely well with 18:1, and I'd guess, based...

CBE makes one, but I've never tried it.
Grouch

I like the 20:1 - my rolling block shoots it noticeably better than ww + 2% tin. So do my 30 30s at velocities well beyond most 45 70s and with a faster twist. The advantages of hard cast are often...

I'd start at 7gr of Unique, try up & down from there. Start at 12gr of 296, try both ways from there. I haven't tried that bullet, but based on similar weights in 30 30, it should be safe and in the...

For what it's worth, Canada Post lists bullets as hazardous goods, and say they won't ship them.(I know, I didn't say there was any sense involved)
Grouch

My theory(based on 50yrs or so) is that your problem is common to new molds, a lot of the things mentioned will help but in any case most of your problems with faulty bullets will disappear by your...

If a lubrisizer is giving you trouble like that, hand lubing is easy, and you can put the lube anywhere you like. Just seat your unlubed bullet to the gas check or first band(or where you want lube...

You shouldn't have to crimp ammunition for a single shot. I wouldn't bother with it. Normal neck tension should do everything necessary.
Grouch

I use ww + 2%tin water dropped from the mold in my '96, and get decent to extremely good results, depending on the alignment of the stars and the other crucial factors - anything from 5/8" at...

I've used both in my rolling block,but mostly with gas checks and only to 250yds. There was very little difference in the bullet drop, both fell in the same group and were indistinguishable. My...

Anodym79: I don't want into the heated discussion. Maybe you could try CBE's 266132 mold, which should get you contact with rifling and 1 - 2 lubrication grooves still covered by the case neck. That...

Milkman, an older friend has used H110 for the purposes you mentioned since the mid '60s without incident. I'm getting close to 30 lb of it used in 257 Roberts, 6.5x55, 30 30, 30 40, 308 Win. 30 06,...

I'd still like to hear Larry's results.
Grouch

I'd say you should check with David Commen about the actual dimensions of the nose. Jim Alison warned me off the 190gr gas checked version of that mold because it was full diameter all the way, and...