We all talk about fps and muzzle flip but I just looked at my little Lyman booklet to see what the data showed.

A 255 gr lead bullet from a old "Cowboy" revolver with w231 does around 880fps.

A 200 gr lead bullet with a full load of Trail Boss will do around 931 fps.

Of course this is just one manual and you need maybe two more forms of data for you to se what the aveage might be.

Do you really have to push your lead bullets into the 1,000 fps zone ?
If your weapon does not lead up the barrel, go for it.