.223 Rem – 77gr Sierra Match King with VihtaVuori N540

The 13th installment of our Mk 262 Mod 1 clone series. VihtaVuori N540 is the primary test powder but we also shoot some groups with Accurate 2520, IMR 8208 XBR, and AR-Comp. Test bullet is the 77gr Sierra Match King with Cannelure.

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Another classic, thanks Johnny

West Desert Shooter
West Desert Shooter

Really enjoy this series JRB! It has inspired me to do my own style of this process, unfortunately I don’t have the means to test all the different powders such as yourself. I do have a bunch of genuine MK262 brass I am going to reload into high velocity 75 grain bullets. I say 75 because I bought bulk Hornady and still want to shoot what I have on hand. Then Ill switch to the Sierras later. Awesome groups and velocities dude always fun to watch the videos that apply to the cartridges I reload for as well!