Originally posted by Popeye212
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You could step up to the 6.5 PRC and add another 2-300 yards to the creedmoor. So really one just needs to figure out their needs/wants and go for it. Regardless of auto-loader or bolt action, there are other things to address first imo when it comes to cartridge selection.
So i just used hornady calculator to compare the 6.5g, 6.5cm, 6.5prc. Using the factory eld-m numbers for the 123, 140 and 147 gr options. They get to 1600 fps impact velocity at 650, 875 and 1125 yards. So the creedmoor went 225 yards further, and the prc went another 250 yards further than the creedmoor. The 140/147 have higher bc and sd of course but the 123 grendel still equals essentially a 168 grain .308 for bc/sd and 1600 fps is a decent usuable min impact velocity for gauging this stuff. Read; higher than .250 sd recommended for 3rd class game like elk etc. and the 168 gr .308 and 123 gr 6.5 have .252/.253 sd's...identical penetration ability by the math. Grendel should smack a deer pretty damn fine at 600 yards if launched around 2500 fps.
So pick your range, pick your cartridge, knowing the recoil jump is going to be significant for each step up. For 0-600 yrd work i don't how you get more efficient than the grendel though? This is looking at things through hunters lenses btw. Targets can obviously go much longer than the ranges i just put out there. These are the parameters i judge by as i only hunt!
The grendel recoils about 60% less than .308 by calculations i found, so likely 50% less than the creedmoor. That's significant for only 225 yards additional reach. Or another way to say that, 50% more recoil for 25% more reach. The prc goes 43% further than the grendel with likely 75% more recoil...haven't done the math but you get the picture. Go grendel go.
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