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At Long Last!

SSL

Gold $$ Contributor
Years ago, I did a complete restoration of a 7 1/2" .45 Colt Ruger Blackhawk. Interior was pretty good but the exterior was really bad. Years spent jammed into a leather holster on a seawater boat had done a lot of damage. Once I acquired it (really cheap, of course) I went to work shortening the barrel, replacing the frame and ejector housing with steel, new hand and oversize cylinder pin, new grips and polish and bluing. While I was at it, I fitted a Bisley style hammer for convenient reach.
During all this, from a now defunct internet forum, an internet friend sent me a quantity of the then new RCBS 45-270-SAA cast bullets he had cast. They were the first bullet that I tried once the revolver was ready to go and they shot wonderfully. Unfortunately, that mold design was new enough to be hard to find and the years passed. During the interim I settled on the old Lee 250-grain RNFP for just plain fun , accurate shooting and cast several hundred.
Fast forward to a month ago and what did I accidentally find at a price not breaking the bank on eBay but a nearly unused mold for the RCBS 45-270-SAA at a great price. I jumped on it and as soon as it arrived I quickly cast a hundred for testing. Cast from my alloy (made from lead sheathing from old telephone cable) the bullets dropped from the mold with an almost boring regularity of 276 to 277 grains after rolling them in White Label lube. A quick run through my Lee .454" sizing die to clean up and true them, load over 17.5 grains of 2400 and I was ready to go. Weather and other problems kept me from shooting them until today. Not able to wait any longer and just to check pressure and etc., I ran out back and popped a quick 24 rounds off. Just shooting at my steel plate, but at 35 yards all shots were on it and the scuff marks were in about a 3" area. Now remember, it is cold and I was really hustling to get back inside so no support of any kind...just shoot and get back inside!
Recoil is fairly sharp but certainly not brutal and velocity should be just about 1,000 fps or a bit less. I can see going a bit higher if I was hunting with that gun, but I have others for that purpose, so if anything I will probably back off for a "use" load that doesn't stress the revolver but still have some "oomph". Just a really long-winded way of saying I'm pretty happy with my find - after all these years!

First picture is just casual shooting off-hand with the old Lee 250-grain RNFP twenty years ago. Second picture is the RCBS 45-270-SAA from my mold lubed and sized. Someday in nicer weather I'll post shooting results on a real target.

Shots fired.jpg 20251211_144915.jpg
 
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I suspect you are well aware that the RCBS 45-270 cast is not going to stress your Blackhawk at 1000 fps. I suspect any "stress" will be too your hand and that will be at a much higher velocity and that will be mostly due to the grip frame not being designed to play nice. The last was a too long sentence saying the standard Ruger BH grip frame is a monster for heavy loads and it will only take multiple hundreds of dollars to swap it out (I hate money BTW).

It appears you have turned the sows ear into a silk purse there. While I never bought one of the RCBS 45-270 molds, it is well regarded for a heavier for a caliber bullet, and when sized correctly using an appropriate hardness alloy (softer, not harder), should always put a smile on your face after shooting.

I am also a fan of White Label lubes, but only use their sticks for lube sizers. Do you by chance have a lube sizer? Many (many!) casters love liquid lubes and wouldn't change from them. I prefer either applying lube with a lube sizer or powder coat (yeah I know, more money and more time) and do not run into issues where I run out of lube on a bullet going down the barrel.

I suspect you can tell I enjoy both casting and Ruger BH's and all of the extra stuff attached to it. I know you will/do enjoy yours and the extra work you have done to it makes it special.
 
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I suspect you are well aware that the RCBS 45-270 cast is not going to stress your Blackhawk at 1000 fps. I suspect any "stress" will be too your hand and that will be at a much higher velocity and that will be mostly due to the grip frame not being designed to play nice. The last was a too long sentence saying the standard Ruger BH grip frame is a monster for heavy loads and it will only take multiple hundreds of dollars to swap it out (I hate money BTW).

It appears you have turned the sows ear into a silk purse there. While I never bought one of the RCBS 45-270 molds, it is well regarded for a heavier for a caliber bullet, and when sized correctly using an appropriate hardness alloy (softer, not harder), should always put a smile on your face after shooting.

I am also a fan of White Label lubes, but only use their sticks for lube sizers. Do you by chance have a lube sizer? Many (many!) casters love liquid lubes and wouldn't change from them. I prefer either applying lube with a lube sizer or powder coat (yeah I know, more money and more time) and do not run into issues where I run out of lube on a bullet going down the barrel.

I suspect you can tell I enjoy both casting and Ruger BH's and all of the extra stuff attached to it. I know you will/do enjoy yours and the extra work you have done to it makes it special.
Thanks for the response. Yes, I am aware that my load can be classed as "medium" range for my Blackhawk, but as you said the grip angle does become a consideration. That's why I replaced the alloy grip frame and ejector housing with steel during the restoration. Every little bit of weight helps (within reason).
I have run similar weight bullets up to 20 grains of 2400 with no pressure issues, but of course recoil increases in proportion. This gun is mostly for fun since I have .44 Magnums in Ruger Super Blackhawk (5 1/5") and S&W 629 (5") and an XP100 in 7BR for actual hunting. I will be trying it with CFE PISTOL in the near future to run in 900 - 1,000 fps range out of curiosity.
I have used the liquid lube on all my cast bullets for years - .357/.38, .44, .45, .45-70 and other heavy .45 bullets for use in sabot loads in one of my .50 muzzleloaders (300 to 450 grains). I have often thought about trying coating, but can't make up my mind.
 
Powder Coating is another step or two obviously, but I find it let's me treat PC bullets between lubed cast and jacketed. If you don't go off of the deep end with colors, you can PC relatively easily. I cannot guarantee it will be the answer to your dreams, but I prefer PC to lubed (but not getting rid of my lune sizers).

Since you are experienced with liquid lube, you are aware of whether it is sufficient for your needs. Sorry for clogging up your post...
 
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Powder Coating is another step or two obviously, but I find it let's me treat PC bullets between lubed cast and jacketed. If you don't go off of the deep end with colors, you can PC relatively easily. I cannot guarantee it will be the answer to your dreams, but I prefer PC to lubed (but not getting rid of my lune sizers).

Since you are experienced with liquid lube, you are aware of whether it is sufficient for your needs. Sorry for clogging up your post...
Not at all! Just a friendly exchange of ideas. No apology needed.
 

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