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[birddog 6]

Hello all;
Been lurking for a while and finnaly joined. Lots of good info here.
I have a couple fo 41 mag Rugers that both have .411 bore and cyl. throat. I know that the cyl. throat should be at least .001 over bore size but what if they are the same size? I have some Black River bullets that are .411 and cast of straight WW pushed with 9.5 gr. Unique for a supposedly 1000-1100 fps load. They lead severely.
Should my throats be opened to .412 and if so; where to get it done or buy a tool? Cylindersmith does not do this size.
Or am I pushing them to fast?
Any help appreciated.

[sav300]

Welcome Birddog from down under,sorry I cannot help you but good luck.

[Heavy lead]

Hello all;
Been lurking for a while and finnaly joined. Lots of good info here.
I have a couple fo 41 mag Rugers that both have .411 bore and cyl. throat. I know that the cyl. throat should be at least .001 over bore size but what if they are the same size? I have some Black River bullets that are .411 and cast of straight WW pushed with 9.5 gr. Unique for a supposedly 1000-1100 fps load. They lead severely.
Should my throats be opened to .412 and if so; where to get it done or buy a tool? Cylindersmith does not do this size.
Or am I pushing them to fast?
Any help appreciated.

In my 41's 7.5 grains of Unique pushes between 1000 and 1100 fps. Do, or have you chronographed those loads, and what weight, mine are cast and lube about 230 grains. Also what style boolit and what lube are you using?
Welcome

[birddog 6]

I have not cronied the load; they are 220 gr. Keith from Black River bullet; unknown lube. I have cast my own with RCBS mold but the sizing is 410 so it is small and they lead. The lube I use on my castings is White Label 50/50. I opened the sizing die up today to .411 but will not get to try it for a couple days. My cast drop with straight WW @223 gr.