45/70 lead casts and sr 4759

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JasonYuke

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Guys beem fooling with some of my casts with 25.2 gr of 4759 and 500 gr lead bullets with good result want to try some 405 grainers that I picked up today as well thinking around 28grains?? to start with.
Anyone have a suggestion starting point with them, still keep with the sr4759 but I found 25.2 is consistant velocity.
Or even abetter powder for a 405 bullet, hard to beat the sr4759 in my books.

Thanks
 
I've used sr4759 for years for shooting cast bullets in most big bores, burns clean and ignites easily. Works well from 35 whelen to 500 alaskans.
Getting back to your question regarding the 45/70 and 405gr cast bullets. Start off at 26 grains to 28 grains should be good for close to 1375fps in the H&R Classic. Another classic load is to fill the case with H4831 and a 405 gr bullet low velocities 1300fps incomplete combustion leaves lot of residue behind which doesn't seem to bother accuracy. A few of my 45/70s would shoot under an inch at 100 yards with decent cast bullets with H4831.
 
Thanks RC this old data is hard to find, I appreciate the advice.
My buffalo classic will hold its own at 100 and 500s but I realy want to try some 405s heard lot of good things about that bullet in the Classic rifle, than come the mold !! if it works.
 
Imagine that,4759 and cast. I had no idea LOL...Glad to hear its workin for ya. When and if you go to a lighter gaschecked bullet you can switch to H4198, but while your still tuning for buff the 4759 is the way. Where you getting your projectiles? I'm going to be casting some 520's if you wanted to give a few a go. I dont want no $'s. It would let you get an idea of what the gun likes best before your buying molds..PS. See you at hunt ont NOT
 
I have a Shilo-Sharps #3 Sporting Rifle with a 30" barrel in .45-70 and my current favorite for target shooting out to 300 meters is 15.8 grains of Unique pushing a Bullet Barn 405 grain gas checked bullet. I chronoed it at about 1280 fps so putting 50 rds down range in practise is not a painful experience.
 
I had a pedersoli Remington Rollingblock in .45-70 and A load I had that worked really well I got from an old 1st edition Lyman Handbook of Cast Bullets. I used a 405gr BB, 22 - 27*grs of IMR 4227, a filler & CCI 200 primer. Velocity is listed @ 1200 - 1470*f/sec. I've never tried 4759 but there are loads listed for that as well. 23 - 28*grs of 4759, for a velocity of 1175 - 1450*. Any help? PM me your e-mail address & I'll scan & send you a copy of the page.
 
If not running a gas-check with the 405s and 500s what velocity should I keep to , this may be leading to the accuracy problems with higher loads.?
I was running 25.5g of sr4759 with 500 casts no GC.
 
Personally, without Gas Checks, even with hard cast bullets, I don't like to go over 1300 f/sec, but thats my choice. The worst experience I've had, reguarding accuracy, in relationship to bullet speed was loading 525gr PB loads in a .458wm. Seems that when I got over 1400 f/sec, accuracy went from minute of a hockey puck to minute of a toilet seat. Some were even going through SIDEWAYS! Things improved considerably when I went to the same weight bullet with a GC, and the same or even slightly higher velocities.
 
LOL I had a few of those yesterday than realized I must be on the upper limit of the load for cast non GC bullets Real BIG HOLES lol!! `cut the target in half, yes had some tumblers yesterday.

I had not bad results with IMR 3031 @ 36.0 g with 405s good holes and managed a minute of coffee can lid with it , and even a few X ringers but again too fast load it down, I like your 1300 fps remark I will try it. Thank you for your help.
 
Earlier I posted a reply on this thread reguarding a light load I used with a 405grBB bullet I used in my single shot. Itworked really well for me. I'll have to give it a try in my guide model. When I do, I'll let you know how it turns out.:)
 
JasonYuke said:
If not running a gas-check with the 405s and 500s what velocity should I keep to , this may be leading to the accuracy problems with higher loads.?
I was running 25.5g of sr4759 with 500 casts no GC.
Click to expand...

Your really best not trying to coralate weight to FPS with cast Jason. The seriously documented data coralates hardness of alloy to chamber pressure....Honestly I can say that after getting a lee hardness tester and the chart with it, I never fowled a bore or threw a tumbler...The chart will give you the max pressure for a given hardness of projectile..Multiplying the hardness # by 1422 will give you the minimum pressure which controls fowling,accuracy etc,just as much as max pressure
 
grouch said:
I've had very good results with 24 - 25gr hercules/Alliant 2400 in a 45 - 70 rolling block with a 34" bbl. Some groups well under 1" with aperature sights.
Click to expand...
grouch:
That range of load is right in there with the one that worked well in my rolling block, 22 - 27*grs of IMR 4227, also with excellant results.
JasonYuke:
The 525gr PB bullets that tumbled in my .458wm loads were hard, cast out of linotype as were the GC bullets.In my experience, at higher velocities and numerous calibre's, those with GC's perform better. At the lower velocities I made mention of earlier, very little if any accuracy differences.
In a single shot application, neck preasure isn't as significant a requirement as it is in say a tube magazine. There I prefer a little more than just thumb preasure.
Another cast bullet related item I've found to help somewhat in my 444 Marlin with micro groove rifling, especially with higher velocity, is sizing the bullets 0.001" - 0.002" greater than the bore diameter, even with hard cast.
 
I have heard about the micro grove problems. a tester.
These acsts were made by fluxing and skimming wheel wieghts, Never did a hardness test on them but should get.

Back to the drawing board and 4759 but my big question is should I use filler in the case with it, going to be a small charge of 4759 and lots of room, thinking cream of wheat.
 
-I no longer cast as there is a guy locally that does a good job & his prices are very reasonable.:D
-This guy, not only uses a hard mixture, also quenches the bullets in water which is one of a number of methods of increasing the hardness.
- If there is a lot of room between the base of the bullet & the powder charge, it probably wouldn't hurt to fill the gap somewhat. There are any number of mediums you can use. I've never tried cream of wheat, but I did start out with cotton from cotton balls. Now I use a caulking product, made by Tago called Stopdrafts, cut to the required size.:)
 
Yes that sound like pretty good stuff to use, you think better than cotton?
alot of guys I have talked to say Cream of wheat because you can meter it on top of the charge.
 
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