Anyone use 200 TTSX in their 300 rum?

[Tikkamike]

I am looking to buy a 300 RUM and I am hoping to shoot 200 TTSX out of it. just wondering if anyone is using them and what powders they have tried. and velocities they are getting? I am thinking retumbo is going to be a pretty safe bet thanks

 

[Camshaft]

I've got a box on the reloading bench. Haven't done any accuracy testing yet but pressure testing is showing 92.5gr of retumbo to be the top end of the pressure scale for my rifle. That is seated to mag length. I've got some 180gr cutting edge solids on the way which should prove even more exciting that the ttsx/lrx.

 

[venom600]

I've done a lot of load development with my 300 RUM over the last couple of months. The 200g TTSX (now called the LRX) has been the best bullet that I've tried out of my Sendero SF II. My current 'best' load is as follows:
Powder: Ramshot Magnum, 96.5g
Bullet: 200g Barnes LRX
Primer: Remington 9 1/2M
COAL: 3.62

This load is shooting 3207 FPS with 3/4 MOA accuracy. I've shot it out to 760 yds with great success. The BC on the 200g LRX is higher than Barnes claims, based on my testing. When I try and match the ballistics of my load by trying different BCs in JBM I'm getting close to the BCs of Bergers 210g Hunting VLD. I need to fiddle some more to confirm this, but it looks promising right now. At a minimum, it's definitely higher than the BC stated by Barnes.

Here's a link to a thread where I've posted the results of a bunch of 300 RUM load development:
http://www.longrangehunting.com/forums/f19/load-workup-300-rum-70581/

--Ben

 

[ICANHITHIMMAN]

I've done a lot of load development with my 300 RUM over the last couple of months. The 200g TTSX (now called the LRX) has been the best bullet that I've tried out of my Sendero SF II.http://

I thought they were 2 diffrent bullets?

 

[Camshaft]

No. Same bullet just renamed and price hiked, LOL. Some of their lrx bullets are brand new and some are ttsx bullets that fit into the line up.

 

[venom600]

I thought they were 2 diffrent bullets?

Nope. The 200g .308 TTSX was renamed to the LRX. Barnes has added a couple of other bullets to the LRX line which are truly new.

 

[ICANHITHIMMAN]

So now there is the TTSX which is the LRX and the MRX is a diffrent bullet all togher then?

 

[venom600]

So now there is the TTSX which is the LRX and the MRX is a diffrent bullet all togher then?

There is no duplication between the LRX and TTSX lines. They're a different set of bullets all together at this point.

The MRX line has been discontinued.

--Ben

 

[Camshaft]

There is no duplication between the LRX and TTSX lines. They're a different set of bullets all together at this point.

The MRX line has been discontinued.

--Ben

Actually there are duplications. But you are correct in that the MRX tungsten core bullets have been discontinued.

 

[venom600]

Actually there are duplications. But you are correct in that the MRX tungsten core bullets have been discontinued.

Yes, you're correct. The .338 265g bullet is duplicated. The 7mm and .308 bullets are unique between the two lines.

--Ben