Willbird
01-17-2010, 05:19 PM
I was not really sure where to put this info, for the direction I am going with this idea it will involve both muzzle loaders and Paper patched bullets.
The idea is to build a muzzle loader, either a 38 or a 40 that will fire a paper patched bullet with a decent BC.
So that more of the energy expended in firing the bullet actually arrives at the target.
The bullets will be paper patched to a dia that will allow loading from the muzzle, the powder ignition will then bump them up to groove dia, just like the scheutzan shooters did as I understand it.
So to do some ground work on this I cast up some 375449 bullets, I cast them in pure lead because that was what was in my RCBS promelt, I considered using WW but figured what the heck, lets see what happens. That bullet from my mold drops out at 268 grains, it measures .377 dia. These were fired as cast (no paper patch).
My rifle is a post 64 model 70 in 375 H&H.
I poured a case full of BH209 flush to the mouth and got about 65 grains by weight in there, I reduced that to 60 grains by weight to be able to seat a bullet. That would be roughly 85 grains of volume measure.
I did not lube size the bullets, I merely hand seated some lyman gas checks on them, and smeared some felix lube on them by hand. and seated them so the gas check was about to the base of the neck.
Velocity for 4 shots was as follows
2098
2103
2116
2072
When setting seating depth my first round was to a shorter overall length and it's velocity was 2119
I do not yet have the proper height stands to allow me to properly crono and shoot for groups off sandbags so my shots were fired with my elbows resting on my bench, all 5 shots went into 2" at 75 yards.
All things considered this is very interesting, next I need to find a method to make a bore dia paper patched bullet to try so that I can ensure the BH209 powder will bump up a bullet like black powder does, I think due to the fact that it seems to wrk great in a 50 caliber with a Hornady Great Plains bullet that it will work fine.
Also I fired a total of 6 shots in excess of 2000 fps with gas check bullets cast of pure lead...there was a tiny bit lead in the bore near the muzzle that came out with a tight patch, I would not have been surprised if the first shot leaded the barrel from breech to muzzle
Bill
The idea is to build a muzzle loader, either a 38 or a 40 that will fire a paper patched bullet with a decent BC.
So that more of the energy expended in firing the bullet actually arrives at the target.
The bullets will be paper patched to a dia that will allow loading from the muzzle, the powder ignition will then bump them up to groove dia, just like the scheutzan shooters did as I understand it.
So to do some ground work on this I cast up some 375449 bullets, I cast them in pure lead because that was what was in my RCBS promelt, I considered using WW but figured what the heck, lets see what happens. That bullet from my mold drops out at 268 grains, it measures .377 dia. These were fired as cast (no paper patch).
My rifle is a post 64 model 70 in 375 H&H.
I poured a case full of BH209 flush to the mouth and got about 65 grains by weight in there, I reduced that to 60 grains by weight to be able to seat a bullet. That would be roughly 85 grains of volume measure.
I did not lube size the bullets, I merely hand seated some lyman gas checks on them, and smeared some felix lube on them by hand. and seated them so the gas check was about to the base of the neck.
Velocity for 4 shots was as follows
2098
2103
2116
2072
When setting seating depth my first round was to a shorter overall length and it's velocity was 2119
I do not yet have the proper height stands to allow me to properly crono and shoot for groups off sandbags so my shots were fired with my elbows resting on my bench, all 5 shots went into 2" at 75 yards.
All things considered this is very interesting, next I need to find a method to make a bore dia paper patched bullet to try so that I can ensure the BH209 powder will bump up a bullet like black powder does, I think due to the fact that it seems to wrk great in a 50 caliber with a Hornady Great Plains bullet that it will work fine.
Also I fired a total of 6 shots in excess of 2000 fps with gas check bullets cast of pure lead...there was a tiny bit lead in the bore near the muzzle that came out with a tight patch, I would not have been surprised if the first shot leaded the barrel from breech to muzzle
Bill