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Wheel weights are the foundation for most of us. WW+2% tin seems to be the most used alloy and is very similar to 6-1 WW-Lino. When available, reclaimed shot with a percent or two of tin added is a great alloy.
Any of these are suitable for all but the hottest of pistol loads when air-cooled and also work well in milder rifle loads. If you just drop them into a bucket of water as you cast and age a week, they will work up around 40k psi.
For the limits of cast bullet performance, you bake the bullets for an hour at just under their slump point and water quench. Ovens vary so a little experimentation is in order. 435 indicated degrees is right for my oven.
Mail order alloys have been out of the question for most of us because of freight costs which can easily double costs. Freight is not prohibitive for tin or antimony because of the much smaller quantities involved. The newish USPS flat rate priority mail box may make buying alloys more feasible since 70 pounds can be shipped anywhere in the country for $7.70, but sellers have been slow going to that method.
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