I have had great success with 80gr TTSX bullets in the 257R/25-06 and 257Weatherby. I have some 100 gr TTSX to try in the 257Weatherby but since the 80gr ones work so well I have not tried loading the 100gr bullets.
The e-tips are much like the old Barnes X-bullet and it was a poor design. I love Nosler Partition just wish they would cut some relief grooves into the E-tip bullets.
Use TTSX and not the TSX. Seat them deep---to the top relief groove. Push them fast--seems the faster I push them in any caliber/cartridge the more accurate they are. The faster you push them the better the terminal performance is. Go lighter weight bullets than you usually use--they work like a lead core bullet 30% heavier--they also expand better.
We have used the TTSX bullets for deer/hogs and a sheep so far. Took a 30-06 with them to Africa but never used the rifle. I used a 338win mag with 225gr A-Frames and my daughter used a 257R with 120gr A-Frames---everything died and tracking was not required for more than 80 yards on any animal.
In my MKV with 69.5grs IMR4831 I get an ave of 3749FPS and very accurate. Using RL22- 71.5grs- I get 3702fps.
Using RL25 -73grs- I get 3695fps
Using Win780--71.5grs--I get 3655fps
Using the 100gr TTSX I get 3715fps using 71grs of RL22 and it is very accurate and 3603fps using 68grs of IMR4831
In my 264win mag using 100gr TTSX in order of accuracy:
74.4grs Mag Pro--3644fps--one hole group for 5 shots
65.5grs RL22--3529fps
71.6grs Retumbo--3464fps
These are just a few of the ones I have tested in a number of different cartridges/rifles. I have yet to find a cartridge/rifle/pistol I could not get an excellent load for and usually with very little testing.
I once fired a 257 Wby loaded with a 60 gr Hornady flatpoint (designed for the 25-20) over a chronograph. The velocity 15' from muzzle was 4500+fps. the barrel had a 1-10" twist and the bullet didn't make it to the 100 yard target- appearing to disappear in a cloud of grey smoke about 50 yards from the rifle. I didn't shoot any more of them.80gr in a 257 bee, holy lifting Lizzy how fast are those moving
I once fired a 257 Wby loaded with a 60 gr Hornady flatpoint (designed for the 25-20) over a chronograph. The velocity 15' from muzzle was 4500+fps. the barrel had a 1-10" twist and the bullet didn't make it to the 100 yard target- appearing to disappear in a cloud of grey smoke about 50 yards from the rifle. I didn't shoot any more of them.
I once fired a 257 Wby loaded with a 60 gr Hornady flatpoint (designed for the 25-20) over a chronograph. The velocity 15' from muzzle was 4500+fps. the barrel had a 1-10" twist and the bullet didn't make it to the 100 yard target- appearing to disappear in a cloud of grey smoke about 50 yards from the rifle. I didn't shoot any more of them.
I have heard a 0.050 jump is preferable. The OAL of the 70gr TSX that I have which was loaded for the military in 5.56 is @2.241"I load the TTSX 100 Grain in both my 257 Roy and my brothers 25-06. Outstanding results on deer, pronghorn and caribou. I would have no reservations whatsoever. Never used the eTip or GMX as I didnt see the need with the performance of the TTSX and TSX previously experienced. As stated elsewhere, seat to the last groove on the bullet. They seem to like a little freebore for best accuracy in my rifles.
Use TTSX and not the TSX. Seat them deep---to the top relief groove. Push them fast--seems the faster I push them in any caliber/cartridge the more accurate they are. The faster you push them the better the terminal performance is.
^^^ Even more jump is good. I have a number of rifles/Encore pistol barrels with .080 and more. The Weatherby rifle have a lot of freebore with any ammo. I have over .200" with my 80gr TTSX or with Weatherby factory 80gr TTSX and get 5+ shot into one large (3/4") hole. Load to the last groove is the smart thing and if you look at the factory ammo you will see they do so also.