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Old 08-24-2019 | 12:30 PM
  #28  
Idaholewis's Avatar
Idaholewis
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Joined: Mar 2016
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From: North Idaho
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Bronko, How could it be different?

Here are SAAMI Specs for a few of the more popular, Notice the similarities in Bore/Groove Diameters?

.45/70 Government .450 Bore/.456 Groove
.450 Marlin .450 Bore/.456 Groove
.458 Lott .450 Bore/.458 Groove
.458 Win Mag .450 Bore/.458 Groove

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