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Posted: 1/20/2009 8:37:22 PM EDT
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O.k. we all know the books say don't do it for a particular set of loading data.
But done safely and working form a starting point of a similar bullet and a given powder seams sane to me. In particular I'm wondering about .223 loads. For one thing I think it would be nearly impossible to put WAY too much powder in one. there's just not enough room and most powders utilize most of the case volume anyway. call me crazy but i think one would have to really stray from the data to get a dangerous over pressure condition. 
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As long as you are staying well under maximum loads, there should be no real problems if the bullet weights and shape are similar. Always work up to maximum loads for a particular case, bullet, powder lot, and primer. Any one of these changes in a maximum load could put the pressures over the top.
You wouldn't want to swap bullets that have vastly different shapes like a blunt roundnose with a boat-tailed spitzer even though the bullet weights are similar. These two extreme different shapes will create different volumes in the case where it matters: in relation to where the bullet engages the origin of the rifling. Also, bullets that have different construction (e.g., jacketed lead and steel core) will have significantly different chamber pressures for a given powder and charge. Again, this stems from the difference in case volume. |
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It depends on the bullet's construction. You cannot simply substitute a thin-jacketed soft-core varmint bullets for thick jacketed hard core military bullets or pure copper Barnes-X bullets.
But Sierra Blitzking vs Hornady V-Max would be OK, provided you stay clear of the lands. |
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