SR4759 Under 195g Barnes in 45 Cal

[hogwild]

I have 8lb+ of SR4759 on hand and only use it in my 50 cal Savage ML2. I’ve had a 45 cal Buckwacka from Millenium Designed Muzzleloaders I haven’t shot in years (since getting the Savage) so I want to use it again.

The Buckwacka has a modern barrel designed for modern rifle pressures. It is rated to shoot 200g of pellets shooting bullets 200g and under. I used to shoot 200g of Pyrodex pellets under the 195g Barnes at 2,850 fps.

Well I want to shoot smokeless powder in it. Since I have the SR4759 on hand, I’d like to try using it. I ordered the light blue Harvester sabots and have 195g Barnes to test. Would like to find an accurate load around 2,400 fps.

What charge weight would you suggest I start with? I’m thinking 35g but would appreciate your thoughts and experiences.

[ET]

Why would you even suggest using smokeless powder in a black powder muzzle-loader?

The Buckwacka is a muzzleloading rifle designed by Millennium Designed Muzzleloaders (MDM). It is a .45 caliber black powder rifle with a stainless steel barrel and action, and a Mossy Oak Breakup stock 1. The Buckwacka is based on the break-open action of the H&R rifles and shotguns, which makes it simple to operate 1. It has a 25-inch stainless steel barrel and takes a 209 shotgun primer that slips directly into the breech plug 1. The Buckwacka has a maximum load of 150 grains of black powder or Pyrodex, according to the paperwork that came with the rifle 1. The same model now has a maximum load of 200 grains while the .50 calibers are still at 150 grains of black powder or Pyrodex 1.

[cuda]

DON'T DO IT! Sell it and forget it you could die if you tried it.

[hogwild]

I purchased this muzzleloader new so I'm familiar with the specs. I know the 200g powder rating when using bullets 200g or less. I know the barrel is rated for modern smokeless rifle pressures.

I appreciate your concerns about safety...really I do. Could you be more specific about your concerns? Are you thinking the breech plug is a problem? Or is it the break open action?

Appreciate your thoughts.

[mrbuck]

Be smart and take the advice given here !