Go to Marlinowners forum, under 444 you can get all the info you need. I used the 265 Hornaday for a dozen elk and twice that many deer. It worked great but is not in production right now.
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http://www.hornady.com/store/44-Cal-.430-265-gr-FP/http://www.midwayusa.com/viewproduct/?productnumber=605468
