455 webley load data help
- Thread starter clift83
- Start date
- Location
- Alberta, North America
4.5 grs Unique
3.6 grs Bullseye
4.4 grs Trailboss
Their all good, work well with the 265gr LRPs, I use all three powders in two .455s, using 455 Colt, Webley MKII both large + small primer cases.
3.6 grs Bullseye
4.4 grs Trailboss
Their all good, work well with the 265gr LRPs, I use all three powders in two .455s, using 455 Colt, Webley MKII both large + small primer cases.
None of thode powders is suitable for 455 Webley.
Unique is good powder in 455 webley. Does tend to be dirty in lighter loads but it still works even then. That said, I don't know of a better powder for these old low-pressure cartridges. The faster burning pistol powders like Bullseye & 700X also work well but also have a steeper pressure curve. Unique burning characteristics are not so abrupt and maybe closer to 3f black powder.
The Lee data has been heavily sanitized by their legal section, probably due to the age and condition of some 455 webley revolvers.
Occasionally you'll read advice to "work up a load" in these antique revolvers, and that can be misleading. Max pressure for the antique 455 webley revolvers is about 13K psi. There will be no pressure signs except possibly primer extrusions on sloppy firing pin channels at anything under 20K psi or more. Don't depend on fired brass to tell you when you're approaching maximum pressure. The first "pressure sign" could be your revolver coming apart. A chronograph is a good investment.
I load max 4.5gr Unique in the shorter MKII brass (Starline), and max 5gr Unique in the older MKI and Dominion brass with both 265gr HB and 220gr flat base and it's worked well.
The Lee data has been heavily sanitized by their legal section, probably due to the age and condition of some 455 webley revolvers.
Occasionally you'll read advice to "work up a load" in these antique revolvers, and that can be misleading. Max pressure for the antique 455 webley revolvers is about 13K psi. There will be no pressure signs except possibly primer extrusions on sloppy firing pin channels at anything under 20K psi or more. Don't depend on fired brass to tell you when you're approaching maximum pressure. The first "pressure sign" could be your revolver coming apart. A chronograph is a good investment.
I load max 4.5gr Unique in the shorter MKII brass (Starline), and max 5gr Unique in the older MKI and Dominion brass with both 265gr HB and 220gr flat base and it's worked well.
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Jet, you have a lot of experience with 455 Webleys.
(By the way your 265gr bullets are really awesome... purchased a few hundreds a while back)
Regarding 3gr of Trail Boss behind your 265gr bullet... is it too low or just right to be on a safe side?
(By the way your 265gr bullets are really awesome... purchased a few hundreds a while back)
Regarding 3gr of Trail Boss behind your 265gr bullet... is it too low or just right to be on a safe side?
