Originally Posted By COMtnClimber:
Greetings. Happy (early) Thanksgiving.
I was curious if you guys could help me understand when (or under what circumstances) you would grab a 6.5 CM over a Grendel. Or the other way around. I have read that you gain several hundred yards more (I can reliably find a range that goes to 1000yrds) , and there is less affects from wind. This seems to be at the expense of weight (~2 lbs?) and added expense of the round.
I am trying to decide between the two and would like your insights. I have been paralyzed by indecision since deciding on a 6.5 Grendel, then the release of the CM.
Thank you in advance
I've shot the .260 LaRue for quite some time, the LaRue 6.5CM for a shorter time and the LaRue 6.5G for the least time. The 6.5G is very soft shooting, accurate and quick on target; it was a very pleasant shooting round, but had more knock down power than a 5.56. The only drawback would be the ballistics that do not favor much past 500-600 yards. Now, I know some of you are probably shooting the G past 600, I'm just offering an opinion so YMMV.
I took my LaRue 7.62 and when Mark released the 6.5CM barrels, I bought a couple and slapped one onto the LaRue large frame. As a note
, the AR15 is standardized, so one barrel will work in another upper and vice versa. Not so in a large frame as there are two "standards" and variations within each. The LaRue barrel extension is different than other manufacturers, so it only fits the LaRue upper. If you want to use a different extension, you need to do some work to get it to fit. Anyways, the 6.5CM shoots flatter than my 7.62 and bucks the wind better. I had it sighted at 100y in 3-shots and then took it out to 300 and 600y at Quantico. Granted, it was square range stuff, but it was dead on and another easy caliber to shoot.
I'll say the same for my LaRue .260. I was an early adopter and have been shooting it since February (see my 260 thread). Again, another flat shooting caliber that helps wind calls, but again, my experience is all square range.
The basic difference in the 260 and 6.5CM is the cartridge design and the caliber of the day. The 260 has more case capacity before you compact the powder and the 6.5CM has a longer neck so you can tension the bullet better. Ballistically they're about the same, reloading may give an edge to the 6.5CM and flavor of the day favors the 6.5CM (for now).
Maybe folks who have more time behind the 6.5CM will chime in and offer their opinions.