I'm sorry for not getting back to this thread earlier, but I have been really busy at work. Another poster made my point for me in that if comparable weights and bullets are used then similar results would be obtained. And for the record, I do believe the Grendel cartridge is a respectable deer cartridge within its reasonable limits; Same as the 30-30. Agreed, the 6.5 Swede will outrange, and out perform any of the other cartridges discussed thus far in this thread. I routinely use my .260 Remington for deer sized game and it performs exceptionally well. If one believes the Grendel gives acceptable performance at extended ranges, then I am not going to change their mind. But you won't convince me that it does either. I have no problem with confirming that my 336 chambered in 30/30 Winchester is perfectly capable of taking deer at 200 yds with a 150gr Core-loct, because I have done it. I'll agree that 200 yds is acceptable range for the Grendel cartridge as well, and possibly to 300 but no more. Beyond that it is time to get a bigger cartridge. To compare a 120gr bullet ballistically with a 170gr bullet is not reasonable. Then consider the bullet shape there is no comparison. As I said in my original post, I am a 6.5 Grendel fan, but I also do not believe the hype that surrounds this cartridge. True Grendel proponents will argue that the 6.8 SPC cartridge is not good enough for 300 yd deer sized game however the ballistics for the 6.8 and the Grendel are almost identical to that range. A lot of people are not capable of shooting that far, accurately. And I'm sorry MrMajestic, but posting a picture of a fawn shot in the head proves nothing about bullet performance. Especially one where the exit hole is along the jaw line, which could be interpreted as a near wounding shot and not a killing shot. Pictures such as these do not "help" us as hunters. They only provide fodder for the anti's.
Lets just agree to disagree on the validity of the claims placed on the 6.5 Grendel. It is a capable cartridge and one I like, but I do not believe it is the proper choice for deer sized game at distances beyond 300 yds.