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Author Topic: 45-70 350gr load  (Read 1405 times)

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Offline bersa380

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45-70 350gr load
« on: March 24, 2013, 02:34:58 PM »
Hello I have bought some Hornady 350gr FN bullets to load up for my Buffalo Classic. I started loading them with 37gr of AA5744 this is top end 1895 loads in both of my books. Min OAL is 2.550 but I have to load to 2.509 to get it to chamber in my buffalo classic at that point it is just barely touching the rifling. Is .041" deeper going to cause excessive pressure with this load? All help is greatly appreciated.



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Offline bersa380

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Re: 45-70 350gr load
« Reply #1 on: March 25, 2013, 11:44:06 AM »
Bump

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Offline quickdtoo

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Re: 45-70 350gr load
« Reply #2 on: March 25, 2013, 12:27:20 PM »
Decreasing COL will increase pressure, but FWIW, Quickload software predicts that load to be 32162psi based on the default case capacity of 79gr water, which is well within the rifle's capability, H&R recommends 1895 levergun loads for the SB2 framed 45-70s, Hornady and Hodgdon both set levergun limit at 40kcup(40kpsi), so you'd easily be good to go.  Be aware that H&R chambers the 500S&W in their rifles also, same frame as the BC, it has a SAAMI MAP of 60kpsi, and most data goes to about 53kpsi, so even using modern rifle 50k 45-70 loads in the BC isn't going to be dangerous, although it will be dangerous to the guy shouldering it.  ;)

My best load in one of my BCs is H322 and the 350gr Hornady RN, I throat reamed the barrel so I could load to 2.555" tho.

Tim

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Offline bersa380

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Re: 45-70 350gr load
« Reply #3 on: March 25, 2013, 12:37:36 PM »
Thanks for that I will have to check out that software. I had thought about signing up for the throating tool on here probably need to do that and get it over with.

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Offline jkpq45

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Re: 45-70 350gr load
« Reply #4 on: February 17, 2014, 12:59:36 AM »
How'd this load turn out?  Did you fire it over a chronograph?
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Offline bersa380

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Re: 45-70 350gr load
« Reply #5 on: February 17, 2014, 01:04:24 AM »
It turned out really well I shot all 50 of them now and due to the shortage was unable to get anymore I have since bought some RN 350gr to play with. I don't have a chronograph. And I never shot paper but I was consistenly hitting a 66% ipsc steel target at 300 yards.

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Offline revbc

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Re: 45-70 350gr load
« Reply #6 on: February 17, 2014, 06:54:28 AM »
Here's what I settled on after fooling around with about 50grs of the same powder.  Like to have knocked my shoulder off!!! :o :o :o

This is much NICER. ;)

The FN (flat nose) 350gr speer should work nice in your rifle without throating.
 
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Offline tacklebury

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Re: 45-70 350gr load
« Reply #7 on: February 17, 2014, 08:25:17 AM »
My load is 48 gr. Reloader7 with that bullet.  It's accurate and at 350 yards I'm getting around 6" groups with iron sights.  At 100 yards I've had a couple sub moa groups and consistently right around 1 moa.  The maximum load I've used is 50 gr. and it's a bugger of a kick and would probably loosen up the firearm if used a lot.  I'm sticking to cast bullets in my BC now, but it this load is still in use in my 22" barreled version.  ;)  As you see when this picture was taken, I hadn't reamed my throats yet and I had to seat the bullet past the Cannelure.  I highly recommend renting the GBO throating reamer for .45-70 and take her about 1/4" deeper.  Allows me to shoot up to 500 gr. Leads now easily without getting into the rifling.  8)




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Tacklebury --}>>>>>    Multi-Barrel: .223 Superlite, 7mm-08 22", .30-40 Krag M158, .357 Maximum 16-1/4 HB, .45 Colt, .45-70 22" irons, 32" .45-70 Peeps, 12 Ga. 3-1/2 w/ Chokes, .410 Smooth slugger, .45 Cal Muzzy, .50 Cal Muzzy, .58 Cal Muzzy

also classics: M903 9-shot Target .22 Revolver, 1926 .410 Single, 1915 38 S&W Break top Revolver and 7-shot H&R Trapper .22 6" bbl.

Offline jkpq45

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Re: 45-70 350gr load
« Reply #8 on: February 17, 2014, 09:30:09 PM »
are there heavier molds than 500 grains?
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Offline tacklebury

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Re: 45-70 350gr load
« Reply #9 on: February 18, 2014, 07:12:04 AM »
Oh, yeah.  They go up to the 700+ grain range.  8)  This is one I found on my first attempt.  8)

http://www.buffaloarms.com/Detail.aspx?PROD=160277&CAT=4158
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Tacklebury --}>>>>>    Multi-Barrel: .223 Superlite, 7mm-08 22", .30-40 Krag M158, .357 Maximum 16-1/4 HB, .45 Colt, .45-70 22" irons, 32" .45-70 Peeps, 12 Ga. 3-1/2 w/ Chokes, .410 Smooth slugger, .45 Cal Muzzy, .50 Cal Muzzy, .58 Cal Muzzy

also classics: M903 9-shot Target .22 Revolver, 1926 .410 Single, 1915 38 S&W Break top Revolver and 7-shot H&R Trapper .22 6" bbl.

Offline Bearcat 74

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Re: 45-70 350gr load
« Reply #10 on: February 22, 2014, 09:38:38 PM »
Quote from: tacklebury on February 17, 2014, 08:25:17 AM
My load is 48 gr. Reloader7 with that bullet.  It's accurate and at 350 yards I'm getting around 6" groups with iron sights.  At 100 yards I've had a couple sub moa groups and consistently right around 1 moa.  The maximum load I've used is 50 gr. and it's a bugger of a kick and would probably loosen up the firearm if used a lot.  I'm sticking to cast bullets in my BC now, but it this load is still in use in my 22" barreled version.  ;)  As you see when this picture was taken, I hadn't reamed my throats yet and I had to seat the bullet past the Cannelure.  I highly recommend renting the GBO throating reamer for .45-70 and take her about 1/4" deeper.  Allows me to shoot up to 500 gr. Leads now easily without getting into the rifling.  8)






GBO thrating reamer?  My 1895G has a short throat, more about the reamer please.
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Offline jkpq45

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Re: 45-70 350gr load
« Reply #11 on: February 23, 2014, 01:01:11 AM »
Quote from: Bearcat 74 on February 22, 2014, 09:38:38 PM
GBO thrating reamer?  My 1895G has a short throat, more about the reamer please.

Here ya go, Bearcat.  Just follow the instructions in the first post.

http://www.gboreloaded.com/forums/hr-centerfire-rifles/gbo-reamers-available-for-rent/
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