45 colt 255 gr swc 40 gr 777 no wad ?

I don't believe you can get 40gr of 777 in a 45Colt case without some heavy compression and 777 doesn't work well with heavy compression.
 
Knock it back to 30 grains. That should give you contact with the powder with minimal compression. 777 is 15% more powerful in volume than regular BP or other substitutes and it's bad mojo to compress it in a cartridge.
 
40 gr 777 3 f

from my volumetric measure,I can fit 40 gr 777 in the case but it will be compressed with a 255 grain bullet,anyone know if this load Will top 1000 fps:cool:
 
from my volumetric measure,I can fit 40 gr 777 in the case but it will be compressed with a 255 grain bullet,anyone know if this load Will top 1000 fps
Click to expand...

You don't want to compress 777. Bullet needs to just touch powder.
 
Ditto...do not compress the 777. Just enough for the bullet to gently push on it slightly.

p.s. that 777 should be FF not FFF in a cartridge.
 
That makes four who have said to NOT compress 777. It'll require another eight to make a full jury conviction stick;)
 
Here's the straight skinney from the web site:

Triple Seven In Cartridges: Use data specifically developed for Triple Seven FFG only. Cartridge loads should be used exactly as listed in this pamphlet. You may safely use a card or polyethylene wad up to .030" in thickness to protect the base of the bullet. Loading density should be 100% with light compression not to exceed .100". Testing has shown that Triple Seven will perform best when the bullet just touches the powder. Allow no airspace between the base of the bullet and the powder. Do not reduce loads by means of filler wads or inert filler material such as Grits, Dacron or Grex. Do not heavily compress powder charges. The use of filler wads, inert fillers or heavy compression may cause a dangerous situation, which could cause injury and/or death to the shooter, bystanders or damage property. Do not create loads for cartridges not listed. Contact Hodgdon Powder Company for recommendations concerning other loads.

And here's where the load data is:
http://www.hodgdon.com/PDF/muzzleloading_manual_2008.pdf?CHECKBOX_1=on

According to it, 30 gr of ffg under a 250 gr LRNFP will get you about 840 fps.
 
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