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I recently bought some 330 grain RNFP HP bullets for my 45-70 from Stateline bullets, https://statelinebullets.com/shop/cast-rifle-bullets/45-70-330-gr-rnfp-hp/ . These are hard cast (BHN 16) alloy. All the loading data I’ve come across so far is for softer bullets at, what seem to be, pretty mild speeds. Is it safe to use data for 350 jacketed bullets to load with these? I’ll be shooting them out of a Marlin 1895G Guide Gun with the Ballard rifling. The powders I have on hand that would seem to work are: IMR3031 IMR4166 Ramshot TAC IMR4895 H4895 Varget Thanks.
Wag more, bark less.
The freedoms we surrender today will be the freedoms our grandchildren will never know existed.
The men who wrote the Second Amendment didn't just finish a hunting trip, they just finished liberating a nation.
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Joined: Jan 2001
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Campfire 'Bwana
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Campfire 'Bwana
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T R U M P W O N !
U L T R A M A G A !
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Joined: Feb 2009
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Campfire Outfitter
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I have used TAC and IMR-3031 in my 45-70. As well as H-322.
When looking for loads one can use the starting jacketed load as a starting point. It has worked on several different styles of bullets and rifles.
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Joined: Mar 2015
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Campfire Member
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John, those bullets will blow through any deer that you are going to shoot at 1500 fps,ask me how I know.
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Did you order them a little oversized like .001 or .002 over? That usually helps fill the bore a little better with the cast stuff.
Be careful looking at the endless .45-70 data out there. It ranges from very mild to pretty wild which is dependent on action type. The marlin stuff is usually middle of the road or a little higher. The top end stuff is for Ruger #1's so be careful the Marlins can't withstand those pressures.
RL-7, IMR 3031, H335, H322, etc all work. I use RL-7 myself.
-Matt
"The proof of the whisky is in the drinking, the proof of the rifle is in the shooting."
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Campfire Outfitter
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River Ridge, Reloaded 7 is getting a lot of attention lately (I'm gonna try some with some 430 grainers). Go to Cast Boolits Forum or to Marlin Owners Forum...... A huge amount of 45-70 load data! memtb
You should not use a rifle that will kill an animal when everything goes right; you should use one that will do the job when everything goes wrong." -Bob Hagel
“I’d like to be a good rifleman…..but, I prefer to be a good hunter”! memtb 2024
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Campfire Tracker
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RL7 is good, 42grs of 405's and around 47grs for 350's
I switched to 4198 and sr4759
When I die I hope I don't start voting democrat.
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Joined: Dec 2012
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That bullet isn't gas checked and appears to use a conventional lube. All of which means you may not be able to push it too fast without leading. With the powders you have on hand 3031 is going work best. I'd start testing loads that begin at around 1400 fps and work up checking for accuracy and leading. If you can get to around 1800-1900 fps and the load is accurate and doesn't lead that's where I'd stop.
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RL7 is good, 42grs of 405's and around 47grs for 350's
I switched to 4198 and sr4759
What maded you switch from RL-7 to 4198? Which 4198?
The last time that bear ate a lawyer he had the runs for 33 days!
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Joined: Dec 2006
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Campfire Tracker
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A friend has issues in cold weather with RL7 and when it got hard to find around here I went away from it and went to IMR4198 because it was everywhere.
It may have been a strange lot of with RL7 and the cold, it was repeatable though with his loads that there was weird ignition and low velocity with RL7. We both switched to 4198 and neither have had issues.
When I die I hope I don't start voting democrat.
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Wag more, bark less.
The freedoms we surrender today will be the freedoms our grandchildren will never know existed.
The men who wrote the Second Amendment didn't just finish a hunting trip, they just finished liberating a nation.
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