If you buy a Ruger or S&W, you might find 296 to be more accurate.
Yes, the exact same powders but a slight different burn rate to canister.
I worked with many Red Hawks and none liked 296, preferring H110 but the SBH and SRH shot much better with 296. So did the S&W 29's.
Check any recycle places in your area for WW's. Many will sell you a bunch.
Pure lead needs antimony and tin added.