Am considering one or the other for my Schultz & Larsen in 270 win. Are they different or essentially the same thing branded by two companies?
rob

Different.

TTSX has basically their version of driving bands and a plastic tip.

GMX is gilding metal and a tip. This is much like the Nosler E-tip. Nate

Barnes TTSX is a grooved bullet, not a drive band bullet.

The most significant difference is the Barnes is 100% copper while the GMX is gilding metal. Gilding metal is 95% copper, 5% zinc. It is much harder than copper.

The significance of this is the velocity window. The Barnes will lose its petals above (roughly) 3000 fps but open at 2200 fps and some say lower. The GMX barely opens below 2500 fps or so but looks perfect at 3400 fps. There's great pictures in the current Hornady catalog of the GMX at different impact velocities.

At .270 Win velocities, I'd be thinking TTSX. Read the reviews of each .277 on the MidwayUSA website for a good sense of each bullet.

Neither uses drive bands. Both have relief grooves.

The Hornady GMX are compatible with their existing load data. Barnes has their own loading manual. The TTSX is not interchangeable with conventional bullet load data.

I'm a huge Barnes fan and have no experience with the GMX but did just load some for a friend's .300 Wby.

LWD

As a .270 hunter myself, I give a strong 2nd for the TTSX.

I started with the TSX and TTSX and have no reason to move on to another bullet. In actual truth, I started with Nosler Partitions, but have since been using either the TSX or TTSX before thinking about the Partitions in any of my new loads.

While I haven't given the GMX much of a test drive, I haven't been able to achieve the level of accuracy that I have gotten out of the TSX. Have never tried the TTSX yet, haven't needed the extra tip to get them to shoot one hole groups out of everything I load them in.

quote:

The significance of this is the velocity window. The Barnes will lose its petals above (roughly) 3000 fps but open at 2200 fps and some say lower. The GMX barely opens below 2500 fps or so but looks perfect at 3400 fps. There's great pictures in the current Hornady catalog of the GMX at different impact velocities.

I too have wondered about the GMX needing more velocity, and it seems to be so.

Given what Hornady advertises on its website, I'd be worried about any impact velocity lower than 26 or 2700 fps.

friar

Of all the major bullet makers, I've had the least favorable experience with Hornady bullets in the accuracy department. Frankly their regular cannelured bullets are the best they make on big game in my opinion. The SST is junk, far worse than Nosler btips and their new GMX has velocity demands that aren't reasonable as far as I'm concerned.

Barnes gets my vote. I LOVE them and will continue to use them. Both the TSX and TTSX. They've never let me down and it is so easy to find an accurate load. What I really like about them is they typically like higher velocities!

Generally speaking, they shoot best for me 30 thousandths off the lands.

Love this video:

TSX test

Im not one for mono proj, but just wondering how do the E TIPS compare to the TTSX in expansion/hardness department

Looks like I been converted to Barnes.Thanks for the feedback
rob

quote:

Im not one for mono proj, but just wondering how do the E TIPS compare to the TTSX in expansion/hardness department

Some related info. The first three pictures are GMX, Barnes and E-Tip.

Gerard
thanks, just as i thought , not much diffrence between the 3 makes once the vel drops off