New Granite Mountain Arms 550 Magnum Left-hand Now Completed

JD Noblin

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For your viewing pleasure, my gunsmith just completed this full custom left-hand rifle for a client of mine. It's chambered in the massive 550 Magnum and utilizes a Granite Mountain Arms African Magnum action. In addition to the two heavy cross bolts and recoil lug under the front bridge, a custom third recoil lug is attached to the barrel and secured through the stock forearm with an escutcheon and screw. The barrel is Pac-Nor, 30mm QD rings by Smithson, and Turnbull completed the color case work. Solids and softs for this rifle are from Cutting Edge Bullets. For comparison, the last picture is of the 550 Magnum next to a 458 Lott....quite the difference.
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Very well done - beautiful rifle! Love the color case work. This is similar to my .500 Jeffery that Matt Roberts just finished for me on a GMA action. I'll be using CEB for softs and solids too. Already getting good results with the 570 grain flat nose solids and H4350.

Only shot up to .500 Jeffery and .505 Gibbs but have been intrigued by the .550 Magnum for a while. Let us know how it performs!
 
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Even the timing on the screws is well executed. Absolutely beautiful craftsmanship.

22lpi Checkering from the looks of it?
 
Wow! what a cartridge. What are the ballistics of the 550 Magnum?
Think roughly the energy of 600 NE. 8200-8300 ft/pounds or 11,000J. I bought quite a few 650 gr. CEB raptors, which should be awesome, but have not loaded any yet. I have just shot the more mundane 700 gr.
 

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