in2anity wrote:So I take it you're an advocate of opting for something off-the-shelf over the costs and risks associated with attempting a custom build? Question is, when it comes to accuracy, which one wins?
I love experimenting and learning how to do new things.
But when you have a particularly cheap means to "prototype" your endeavour I say give it a try. At least you can learn with it while you're building the custom one
I don't know what sort of accuracy the 300BLK is capable of, but all four of my Ruger Americans shoot very well straight from their boxes. A quick Google does seem to show the accuracy potential of 300BLK is inconsistent at best. Whether that can be addressed by building a custom rifle around the cartridge I have no idea.
http://rifleshooter.com/2016/08/300-blk-accuracy-maybe-it-isnt-you/http://www.300blktalk.com/forum/viewtopic.php?t=94786What sort of accuracy/range are you aiming for with this build?
For example, the Sierra 168gn Matchking has a BC of .462 above 2600fps, but under 2100fps it falls to a BC of .424, and below 1600fps it drops to .405 - and you'll probably not be pushing them much harder than about 1800fps from the 300BLK, about two-thirds the velocity you'd be getting from a .308. It'll be going transonic by about 400m as well. A 150m zero puts it 90mm high at 80m and 200mm low by 200m. It's also down to the "magical" 800ft/lbs by 200m. At the muzzle the 300BLK has the same velocity that the .308 still has at 500m with the same bullet.