M118LR
Master
I guess it's best to start with safety. A match chambered .223 Remington can NOT safely use 5.56 NATO ammo. So along time ago......Bolt Action rifles in .223 REM used to have 1:12 twists for the 53 grain SMK that was popular at the time. Even though I found that the Hornady flat based 55 grain spire point # 2265 with 21.5 grains of IMR 4198 was a better 100 yard round. (real tiny groups) Then along came the 69 grain SMK and barrel twists of 1:9 became the norm in .223 REM Bolt Actions. Which made 55 grain projectiles seem to under perform. (so I'm also guilty of switching to the 1:9 twist) Then along came the 77 grain SMK and twists of 1:7. My current Sierra Loading Manual has separate sections for bolt actions and gas feed (AR), but if you shut off the gas and load each round by hand an AR can be the equivalent of a bolt action. Yet few AR's come with .223 REM Match Chambers what with the popularity of 5.56 ammo. It seems that there has been a resurgence in bolt action mag feed rifles like the MVP etc. but they fit a different niche than the Bolt Action's of Old. So what ever happened to the .223 Rem Bolt Action? Anyone still got/use one? For what purpose and how is it configured. Here is mine. 700 Milspec 5R 1:9 twist .223 Rem Match Chamber 24 inch Heavy Barrel. Target/P-Dog.