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Old 06-03-2021, 10:01 PM

Join Date: 
Aug 2019
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The Thunderhawk is a fine rifle. 1-38 twist. 70 grains of 3f Swiss and a 250 grain 45 caliber Hornady XTP is a great load. The non magnum 300 grain 45 XTP is awesome with the same charge. In mine, I get 1575 fps with the 250 and the 300 gets a flat 1500. Roughly a .454 Cassul level load.
Btw, the 300 grain is the longest bullet, in 45, the 1-38 will handle.
Full caliber, the Lyman Plains with the 70 grain charge, 1350 fps, with a .54 wad over powder is tremendous! Got to cast it yourself.
Great rifle! Have fun!
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