Originally Posted by fireroad
I appreciate the input, but I think you are underestimating the .264 bullets, especially when comparing them to .277 bullets. If you run the numbers you will find that, while the 270 out performs the 260 until about 300 yards, the performance gain is not significant. 264 bullets of the same weight as the .277 have a bit higher BC that allows them to retain more energy and velocity downrange. Basically, I would be just as confident with a 260 as a 270 on elk at the same ranges and bullet weights.
I like the idea of a 130gr TTSX...wish they made one in 6.5mm....
No I'm not. You said yourself you are looking at the 130TSX or the 120 TTSX and went on to say you thought the 130 TSX would be better on elk. I threw in 270 bullets because I know what they do for conversation only. The elk nor deer would know any difference between your 260 or my 270 inside of 400 yards with the 130 TSX in either or your 120 TTSX as far as I'm concerned.
Debating on what little energy and trajectory differences exist is like trying to solve the puzzle of why 2 car occupants are subjected to the same crash energy but one walks away while the other dies on impact. Inside of a few hundred yards, it is really a toss up. But if I were the one buying the box of Barnes bullets to try and both were sitting on the shelf, I'm buying the 130 TSX flat base.
If they made a 130 TTSX boat tail, it would be my top choice in the caliber you have.
There is a video on youtube where a fellow killed a good size moose with his 7-08 and a 120 TSX. Pass through and DRT.
I don't know the velocity numbers on a 130 TSX from a 260. But I have a 270 with a 25.5" Hart bbl that pushes 130 TSX bullets between 3150 and 3180 according to my notes. Looking at the Barnes website, my bullet: 130 TSX has a BC of .431. Your 6.5mm 130 TSX FB has a BC of .365. Even if you are pushing the same velocity, the .277 bullet wins. So from what I can tell, your comment:
264 bullets of the same weight as the .277 have a bit higher BC
...is inaccurate in this case.
I'll take my combo over yours. The numbers so far as I can tell are in favor of the .277 (same bullet wt, same bullet type). Still, good luck with whichever you choose. I don't think the Barnes bullet will disappoint you. I'm not sure why you are worried about expansion up close. That is where I've seen these bullets really shine.
I'd love a shot at a big bull elk with my combo less than 50 yards. But I prefer archery on elk hunts. Just my thing.
The reason the .277 130 TSX has a higher BC than the 130 TTSX is the ogive difference. Same is true for the 6.5mm 130 flat base TSX. The .277 130 TSX has a secant ogive.