This section is for reloading and ammunition only, all loads found in here are used strictly at your own risk, if in doubt ask again.
All handloading data posted on Full-Bore UK from 23/2/2021 must reference the published pressure tested data it was sourced from, posts without such verification will be removed.
Any existing data without such a reference should treated as suspect and not used.
Forum rules
All handloading data posted on Full-Bore UK from 23/2/2021 must reference the published pressure tested data it was sourced from, posts without such verification will be removed.
Any existing data without such a reference should be treated as suspect and not used.
Use reloading information posted here at your own risk. This forum (http://www.full-bore.co.uk) is not responsible for any property damage or personal injury as a consequence of using reloading data posted here, the information is individual members findings and observations only. Always verify the load data and be absolutely sure your firearm can handle the load, especially older ones. If in doubt start low and work your way up.
hi all,
i'm looking for a black powder/duplex load for my metford, i'd like to use gas checked lead bullets to shoot 100/200 yrds, so it does not have to be to strong on the old girl!
apparently you can only get low 40's grain weight of b/p in a .303 case, so having a small charge of a modern powder in the bottom gives it a bit more oomph.
I am an experienced reloader but have never done a duplex load and am not interested in a reduced nitro round, ,
colin
from what I can gather so far is that it only takes 2/3 grns of a powder like unique to boost the charge, there's just no chance of getting enough b/p in the case to get it near to the originals which had a slurry/pellet put in the case before it was necked down,
colin
I often use a duplex load in 45-70 but in a modern firearm.
About 3gns of some fast nitro powder,As,Unique or similar.
Then top off with black. Certainly helps keep the fouling down.
Tony
As Tony I have used tested duplex loads in larger calibre straight walled cases but would be chary about using them in smaller calibre cases like the 303 without good published data.
Come on Bambi get some
Imperial Good Metric Bad
Analogue Good Digital Bad
had a tentative trip to the range this morning, took a few blackpowder rounds with 47.5grns (slightly compressed) and some with 45 grns of b/p with 2grns of green dot (slightly compressed), both were pants!! I wasn't surprised but it would have been nice to get a good group, instead 3 hit the board 4'x4' at 200 yrds with all of them tumbling.
so a bit more homework is required.
colin
If it's modern proofed, would a propellant like Hodgdon's 777 be any good? Not quite a true BP substitute - it's about 10-15% more powerful for the same volume, but also isn't a modern nitro propellant.
I suspect that it is highly unlikely that you would ever get a black powder load to work in a .303 case. The original load was a compressed black powder pellet that had a 'flash' hole along its length. It was also put in the case before the case was necked down and filled the case up to the shoulder.
Good luck in your efforts but I reckon you will end up very frustrated trying to get it to work.
,
