300 rum 180 tsx bullet

kraky · #15 09-30-2006, 10:02 AM

I had a strange result yesterday at the range with a 300 win mag. Retumbo data says a max load of 84 grains (highly compressed in 300 win mag) under a 200 grain bullet will do about 2950fps. I loaded some 200 grain accubonds and 180tsxs with 84 grains. The accubonds did 2950 with no pressure problems. The 180 tsx on the other hand did 3250 (Yikes thats 300 wby territory with 24" barrel) and had heavy bolt lift, extractor marks (very shiney), and shot primer pockets.
So what gives with the tsx....every gun I try them in seems to make too much pressure near max loads with other bullets.
(Then I see people saying you might be able to go 1-2 grains more!)
The load seems safe with a 200 accubond but seems 2-3 grains over max with a 180 tsx!!

keithcandler · #16 09-30-2006, 10:38 AM

Use rubbing alcohol to cool the barrel, put it on with a paper towel to the point to where the liquid is dripping off the bottom of the barrel. You will not believe how fast the barrel cools.

duner · #17 10-02-2006, 07:39 AM

kraky
How far off the lands are you seating the bullets
if the tsx bullets are too close presures go way up.

kraky · #18 10-02-2006, 10:17 AM

I'd say I'm at least .100" from the lands. My gun doesn't have much clip room....I must seat to 3.340" (standard 300 win length) and the lands are always .080-.150 away from there. I should probably have the barrel turned down tighter to the action....I also have an extra .030" headspace on this gun. But, the darn thing shoots pretty good.......it's a $289 savage stevens and I kind of hate to tinker with it other than reloading.

the444shooter · #19 10-03-2006, 06:22 PM

At first I was really excited when I heard Federal was loading the triple shocks...until I looked at the velocities they were getting. I bought the Ultra Mag to push a 180gr bullet ABOVE 3300fps. That said, I loaded the TSXs at 95.5gr of Retumbo. I'm getting 3370-3400fps, which I'm very happy with. However, now that Barnes has redone all of their previously VERY OPTIMISTIC ballistic coefficients, I'm once again, disappointed. Maybe I'll just try the Accubonds or Scirrocco IIs--at least they'll be above .500 bc.

BTW, my gun is just a stock Remington LSS-26"bbl.

duner · #20 10-04-2006, 09:01 AM

what wt bullet are you pushing at that speed.
i dont have a chrono.
I am using the 180 tsx and 100g of retumbo with no presure signs. this is in a remington sendero barrel.i was estimateing my speed in the 3300 range comparing them to the factory loads that i purchaced.
thanks

the444shooter · #21 10-04-2006, 11:23 AM

Duner...they were the 180gr bullets. My cases are also all on their 4th or 5th firing, so they've stretched a bit...I think that's why 95.5gr is MY max. I don't believe anything less than 180gr should be used in the 300RUM. I fell for the Lazzeroni/Weatherby myth a few years ago and bought the 7.82 Warbird and shot the 168gr XLCs out of it at 3650fps...just too light of a bullet out of a big .30cal, and the 180gr surpasses the 168gr after 400yds or so. Good luck with your load development.