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Post by blackmamba on Jan 13, 2021 15:31:49 GMT -5
This is somewhat of a specialized request that is entirely due to the lack of reloading components. I'm running low on LPP but have a large number of magnum SPP and SRP, so I want an accurate lighter load for my 454 Casull BFR using a standard 255 coated SWC, something around 950-1050 fps. I have a good supply of fast to medium burn rate powders to work with, including 700X, Accurate #2, HP38, Unique, Herco, Longshot, Silhouette and HS6. Help a brother out, please!
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Post by Lee Martin on Jan 13, 2021 16:10:58 GMT -5
Try 15.0 of HS6 or 12.0 of Unique. Should be plenty light in a BFR. -Lee www.singleactions.com"Chasing perfection five shots at a time" |
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Post by blackmamba on Jan 13, 2021 16:22:58 GMT -5
Thanks, Lee, will give 'em a try. Anyone else?
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Post by dougader on Jan 13, 2021 16:31:14 GMT -5
Try about 12 grains Silhouette; 13-14 grains of Longshot. Do you have a chronograph?
I almost always used 45 Colt brass for lighter loads in my 454 revolvers. I don't know how tight the chambers are on your BFR, but I could see why a guy wouldn't want to do that with a FA revolver.
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Post by Encore64 on Jan 13, 2021 16:34:55 GMT -5
Try about 12 grains Silhouette; 13-14 grains of Longshot. Do you have a chronograph? I almost always used 45 Colt brass for lighter loads in my 454 revolvers. I don't know how tight the chambers are on your BFR, but I could see why a guy wouldn't want to do that with a FA revolver. I used pin gauges to check the Chambers in my BFR and FA 454s. They were close, but the FA would accept a .001" larger pin. |
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Post by bradshaw on Jan 13, 2021 18:18:36 GMT -5
This is somewhat of a specialized request that is entirely due to the lack of reloading components. I'm running low on LPP but have a large number of magnum SPP and SRP, so I want an accurate lighter load for my 454 Casull BFR using a standard 255 coated SWC, something around 950-1050 fps. I have a good supply of fast to medium burn rate powders to work with, including 700X, Accurate #2, HP38, Unique, Herco, Longshot, Silhouette and HS6. Help a brother out, please! ***** Limited to small pistol and small rifle primers, and a cast 255 SWC, I would make up a dummy on .454 Casull brass. Deep seat SWC flush with case mouth (flat seating stem.). Very light roll crimp. Providing the dummy chambers without drag, load a few test rounds with 6.5/HP-38. Other powders should work as well. If a small pistol primer works, have at it. Otherwise, SR primer. David Bradshaw |
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dhd
.327 Meteor
Posts: 941 
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Post by dhd on Jan 13, 2021 19:01:39 GMT -5
I'm a huge fan of HS6 in "medium" loads and the one Lee suggested would be a good one. Of course the Longshot and Silhouette would be fine powders for such too. Depending on what brand of of the small primers you have, I'd use the SPM and be quite pleased with them.
The reason I mention brands of primers is because there's been lots of chatter over the years that the CCI 400 and 550 are one in the same. I personally use them interchangeably for stout 357 loads and the target says they are the same. Easy enough for you to test if you're concerned but I wouldn't be with that gun and that load. YMMV...
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Post by bigbore5 on Jan 13, 2021 19:53:16 GMT -5
CCI 400 and 550 use the exact same cups. Diamentions and thickness. Can't say as to compounds, but thickness mics the same. That's why they are so hard and handle pressure so well. I'm not set up to measure ignition force or temperature.
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Post by bradshaw on Jan 13, 2021 20:32:32 GMT -5
“.... lots of chatter over the years that the CCI 400 and 550 are one in the same.”
----dhd
*****
What is the source of this information? During development of the .357 Maximum, we BLANKED small pistol primers. BLANKING means extrusion of primer into firing pin hole. Small rifle primers and replacement of Blackhawk mainspring with heavier Old Army mainspring cured blanking. I used CCI 400 and BR-4 small rifle primers, along with Federal and Remington SRPs.
David Bradshaw
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Post by enfield on Jan 13, 2021 20:42:13 GMT -5
Interesting question. I've been curious about how well a SP would work with low pressure loads myself.
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Post by Encore64 on Jan 13, 2021 20:44:48 GMT -5
Interesting question. I've been curious about how well a SP would work with low pressure loads myself. It's not low pressure as much as how easy to ignite the powder used. |
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Post by enfield on Jan 13, 2021 20:48:16 GMT -5
“.... lots of chatter over the years that the CCI 400 and 550 are one in the same.” ----dhd ***** What is the source of this information? During development of the .357 Maximum, we BLANKED small pistol primers. BLANKING means extrusion of primer into firing pin hole. Small rifle primers and replacement of Blackhawk mainspring with heavier Old Army mainspring cured blanking. I used CCI 400 and BR-4 small rifle primers, along with Federal and Remington SRPs. David Bradshaw There have been several recent tests done comparing 9mm loaded with SP, SPM and SR primers of several manufacturers. Velocities and POI were virtually identical. |
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Post by enfield on Jan 13, 2021 20:50:04 GMT -5
Interesting question. I've been curious about how well a SP would work with low pressure loads myself. It's not low pressure as much as how easy to ignite the powder used. I thought the rifle primer was used due to the high pressures involved with the cartridge? |
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Post by Encore64 on Jan 13, 2021 20:57:08 GMT -5
Sometimes, no doubt. But, with the loads the OP asked about, SP Primers should work just fine.
With pressure getting high on top end loads, cup thickness and strength in general is important.
With heavy loads of slow burning powder, good ignition can be a problem. The Magnum Primers are designed to light them off.
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Post by x101airborne on Jan 13, 2021 20:59:30 GMT -5
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