I am casting these heat treated bullets for a 30-06 for velocities approaching 2000 fps. But, what does that matter? I want to know how others are heat treating their bullets. That's all.
You don’t need to heat treat bullets for that level of performance. In fact it will degrade performance for any purpose. Straight wheel weights are sufficient, assuming you have them sized to proper diameter.
Another option would increase hardness a fair bit by dropping your cast wheel weight bullets directly from the mould into ice water.
The critical points however are fit and alloy for the performance you seek. Do yourself a favor and peruse the following website.
http://www.lasc.us/CastBulletNotes.htm
