Moderator: MudBug
540guns wrote:I'm looking for load data for my 450 bushmaster I need data for a 300 grain xtp-mag. I can find data for it just not for the powder I have. I need data for one or more of the following. Winchester autocomp, reloader 17, retumbo, tight wad or alient ar comp. Any will work but I want to use the autocomp. Any suggestions would be great thank you.
540guns wrote:Could the auto comp work if so what grain should I start at
540guns wrote:I found some Imr 4227 any body have some starting data for that
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