Ian
Notorious member
Agreed it's tough to get those .22s hard when quenching because of their low mass. Mine heat treat in an oven/cold quench to 27 bhn after they age about a week if used straight. Water-quenching must be done very briskly from a very hot mould to have any significant effect, which you can get if you cast in a really big hurry and keep that mould hot.
I wouldn't add more than 25% Lino, if even that much. I think Fiver uses a home mix similar to Taracorp Magnum (92/6/4) in his .22s. I just use straight clippy weights and heat treat and have had decent results with the RCBS 55-grain mould, but I'm not pushing them as hard as a lot of folks due to not needing to cycle an action. My COWW get also come out harder than "web sources" as well as published sources, I think due to calcium content of "modern" weights. Air cooled straight come out about 13-14 bhn.
I wouldn't add more than 25% Lino, if even that much. I think Fiver uses a home mix similar to Taracorp Magnum (92/6/4) in his .22s. I just use straight clippy weights and heat treat and have had decent results with the RCBS 55-grain mould, but I'm not pushing them as hard as a lot of folks due to not needing to cycle an action. My COWW get also come out harder than "web sources" as well as published sources, I think due to calcium content of "modern" weights. Air cooled straight come out about 13-14 bhn.