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Post by Pecos Pete on Nov 6, 2017 13:02:42 GMT -5
I've been gradually working through increasingly powerful loads in my Ruger 480 SBH, getting comfortable with the gun while trying to avoid developing a flinch. I started with Trail Boss up to a full case and then Unique. I'm ready for a magnum powder, and I was thinking about using 2400, since it can be loaded down, unlike 296/H110. I'm currently shooting a 340 gr cast bullet from Missouri Bullet Company. From what I've been able to determine by reviewing available data and doing simulations with QuickLoad, the maximum load for this combination would be somewhere around 23 grains. I found one reference where a fellow was shooting 20 grains behind a 340 cast bullet and getting good results. How much below that can I start? I'm not concerned about having unburned powder residue at this point since I will eventually work up to full-power loads. Thanks for your input. |
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Post by bula on Nov 6, 2017 13:18:18 GMT -5
A worthy question. Am in similar place with my 480's. Same bullet on 7.3grs of TB and a CCI350 is fun and likely will zip thru a deer from any angle. Just up from the basement. Been using Longshot powder with the 390HP , the Miha that's popular here. The 390 comes from one just being on my scale, PC'd and sized per Sixshot. Just bumped that load from 10grs to 11grs.. still a grain short of data I've seen. Wonder what 2400 would do, an old friend and some always here.
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Post by Pecos Pete on Nov 6, 2017 14:24:18 GMT -5
My main concern with reducing powder charges is of course safety. In doing further reading, a popular load for the .45-70 is 24 gr of 2400 behind a 405 gr cast bullet. That's only a 50% loading density, according to QuickLoad. 50% density for the .480/340gr combination would be somewhere around 13 gr of 2400. 16.5 gr of 2400 fills 2/3 (66%) of available capacity, so I'm inclined to believe that would be a safe starting point.
Edit: For another data point, Lyman 48th Handbook lists 25 gr 2400 under a 385 gr cast bullet as a starting point for .458 Win Mag. That's only a 33% loading density.
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Post by coldtriggerfinger on Nov 6, 2017 21:53:45 GMT -5
Great thread !!!
I've never loaded 2400 powder. But would like to try some. I have the Lee 476/400 mold and the Mihec 477/640 mold.
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Post by bigmuddy on Nov 6, 2017 23:52:35 GMT -5
Starting load in Hornady manual for a 325gr. XTP Mag bullet is 16.6 grains. Max load with this bullet is 22.5 grains. For the 400gr. bullet it is 14.8 grains to start and a max 17.5 grains. Don't know what you can do with the information, but there it is.  Dan |
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Post by Pecos Pete on Nov 7, 2017 11:13:02 GMT -5
Great thread !!! I've never loaded 2400 powder. But would like to try some. I have the Lee 476/400 mold and the Mihec 477/640 mold. Yeah, I think 2400 is an underappreciated powder. According to my reloading log, I used it for awhile around 20 years ago for magnum handgun rounds but abandoned it in favor of H110 because I was seeking maximum velocity. But 2400 is such a useful and classic powder that it belongs in everyone's powder cabinet, right next to Unique. |
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Post by Pecos Pete on Nov 7, 2017 11:14:48 GMT -5
Starting load in Hornady manual for a 325gr. XTP Mag bullet is 16.6 grains. Max load with this bullet is 22.5 grains. For the 400gr. bullet it is 14.8 grains to start and a max 17.5 grains. Don't know what you can do with the information, but there it is. Dan Thanks for that information. It does help. I think I'm on the right track if I start around 16 grains. |
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Post by Pecos Pete on Nov 16, 2017 17:34:35 GMT -5
So, after some range testing last weekend, it turns out that 16 gr of 2400 is indeed a good starting load with that 340 gr Missouri bullet. I did not see any evidence of excessive (or any) unburned powder when using a firm roll crimp. I'd rate the subjective recoil on par with around 10 grains of Unique, and QuickLoad seems to bear this out by showing similar calculated pressures. Next, I'll be working my way up to 20+ grains of 2400. Got as far as 18 last weekend but noticed a significant jump in recoil going from 16 to 18, so I saved the 20s for next weekend. Also, point of impact dropped by a couple of inches going from 16 to 18 gr. It may not be possible to use the same front sight all the way from mouse fart to full-house loads. Sorry that I have no velocity data at this point--I'm still working on getting my ancient Chrony back in business.
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Post by depcon3 on Nov 16, 2017 23:50:53 GMT -5
I settled on 18.5g of 2400 in my 6.5” 480 with the Lee 400g RNFP(powder coated) in Starline brass. It chronographed at 1125fps average with SD of 10.9 and is sighted to have impact about 2” above the front sight at 50yds. I hope to hunt with it real soon!
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Post by bula on Nov 17, 2017 9:12:20 GMT -5
Aaah ! Now that's useful . Thanks.
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Post by coldtriggerfinger on Nov 30, 2017 1:22:01 GMT -5
Has anyone done more testing with 2400 with bullets in the 400 gr weight class. ? Seems like a good moderate powder.
Also , has anyone got a light to moderate load with 4227 ?
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Post by coldtriggerfinger on Nov 30, 2017 3:44:34 GMT -5
Has anyone done more testing with 2400 with bullets in the 400 gr weight class. ? Seems like a good moderate powder.
Also , has anyone got a light to moderate load with 4227 ?
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ebg3
.30 Stingray
Posts: 157
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Post by ebg3 on Nov 30, 2017 6:37:48 GMT -5
I settled on 18.5gr 2400 under my cast 400gr RCBS bullet lubed and sized to .476". Using a regular large pistol primer it's running around 1150fps out of my 6.5" Bisley. I'm using a soft 50/50 home brewed lube in my lube/sizer. With my alloy, bullet hardness should be around 10-12 bhn.
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Post by leftysixgun on Apr 3, 2019 13:26:36 GMT -5
Im resurrecting an older thread here.
For you guys that are using 2400 and the MP 477-640 boolit, which groove are you using?
I have some loaded now and plan to try today. I crimped the groove (2nd groove??) making the OAL the longest.
Hope this 2400 works!
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Post by mart on Apr 3, 2019 15:41:02 GMT -5
I've used 17 to 19 grains of 2400 with that bullet in its HP form, crimped in the top groove. Comfortable and accurate load. I could not discern any accuracy difference between 17, 18 or 19 grains. I use the same loads with the Lee 400 grain flat point and Lee 400 grain SWC.
Have only started to play with 4227 and am not home where I can access my loading notes.
I've used Bullseye, Unique, Trailboss, 2400 and just started with 4227. I plan to work with some HS6 soon. I did try a few H110 loads when I first had my 480 but prefer 2400. It will make a 480 do everything I need to do.
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