.308 TTSX Load....

[BigPat]

Interested to hear from anyone who is using TTSX in their .308.

I am not a fan of compressed loads so....

I generally use N140 for my .308 and been very happy with it behind 150gr Speer SPBT running a MV of 2650fps. But now I am starting the move over to non-lead bullets with a plan to use 130gr TTSX. I am running the numbers through Quickload and it looks like I may struggle to get above 2600fps in my 20" barrel with 43.3gr of N140 if I want to stay sub 100% fill, which I do.

So starting to look at the alternatives.....

48gr of Ramshot TAC is sub 100% fill and looks likely to produce just over 2800fps.

or I could start looking at the 110gr TTSX?

45gr of N140 would then produce a sub 100% load with just over 2700fps MV
or,

using 50.6gr of TAC would still be sub 100% fill but be pushing just over 3000fps MV

I guess others on SD may be starting to look at the same numbers and thought it would be interesting to hear from those who have already moved over to non-lead and particularly those using TTSX.

Maybe the 110gr is too light for my purposes? I am shooting mainly Fallow and often big boys (Head/Neck and boiler room shots).
Maybe my dislike of compressed loads is unfounded and I should get over it? It just seems wrong to overfill the cases and I hate the sound of powder being crushed when seating the bullet.
Maybe I am worrying too much about speed? I am not someone who normally chases fast/hot rounds but I want the TTSX to open properly at ranges from 50m-250m

As a final disclaimer, the above numbers for TTSX are theoretical and taken from Quickload. I am not suggesting anyone uses them without following safe and proper reloading practices.

 

[Selous]

N140 will get to 3000fps but only with a compressed load. N135 will get to 3100fps and is a better burn rate for your specifications (non compressed). I am just getting to the end of my H4895 which also worked well and gave 3000fps without compression

 

[09mutley05]

I’m using the 130s on fallow and haven’t had any issues using Max load with n140, I wanted to use Ramshot TAC but couldn’t get hold of any. Got a box of 110s to try at some point but will need to use a different powder. Interesting to hear about n135, I may have to get a pound to try out

 

[Alantoo]

I use N135 for both 110 and 130gr TTSX.

I have shot fallow with both with no drama.

Alan

 

[Utectok]

I’m not sure why people don’t like compressed loads? Anyway I use a drop tube (brass tube from eBay) with my ttsx 130gn load and no compression seems to result. I’m getting 2950fps with 48gn n140 no signs of overpressure and no kernel crunching

 

[wytonpjs]

Using up my mountain of IMR4895 and I have a 130gr TTSX load that works very well in my 20” Sako S20 .308 Just saying