TSX Accuracy SUCKS!!!

Gatehouse

Gatehouse

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Pemberton BC
I was at the range last night. WInd was blowing pretty steady, with lots of gusts. I tried to shoot in between the gusts.

I was doing a load work up with my 7RM


Ruger Mdl 77 MKII Stainless.
B&C Synthetic stock
Timney trigger
Leupold 2.5-8x36 Vari X III

.284 140gr TSX
IMR 7828
Federal 215Match Magnum Primer
Winchester cases (Flashhole deburred, +/- 1gr in weight, trimmed evenly, chamfered)

I often work up a load by firing multiple charges at the same target. This allows me to monitor the velocities, as well as see what charges will fall close together. Then I generally pick the best 3 and experiemnt with them.

Generally, I want to get bullets seated close to the lands- .030-.050 off. Barnes often reccomends .050.

In this case, it was impossible to get the 140gr TSX anywhere near the lands. This rifle is well worn, and I've watched the throat erode for some time.:) Since this was to be a hunting load, I seated the bullets so they would easily fit in the magazine box.

First 3 shots:
67, 68, 68.5


Picture856-copy.jpg


Finished target:

67
68
68.5
69
69.5
70
70.5
71
71.5
72
72.5
73


Picture857-copy.jpg



There were 2 flyers in the group of 12, Don't know what happened, it coudl have been a change in hold, a gust of wind or something, who knows? I'm not going to worry about it.

Due to failing light and possibly the wind, the chrono stopped workign at 3027FPS, a charge of 70.5 grains.

Although I experienced no real pressure signs, the 73gr load recoiled a bit harder than it shoudl, and I needed to use 2 fingers to lift the bolt instead of one, but I couldn't say what the velocity was.

I think I will go with a charge in the 71-72gr area, as it shoudl attain approx 3100fps, which will give me good velocity, excellent accuracy and be comfortable to shoot.

Group size for 12 rouds was about 1.5-1,75"


***PLEASE NOTE: IMR POWDER RECCOMENDS A MAXIMUM CHARGE OF 69GR IMR 7828 WITH A 140GR BULLET. THESE LOADS WELL EXCEED THIER MAXIMUM CHARGE. DO NOT USE THESE LOADS IF YOU ARE NOT AN EXPERIENCED HANDLOADER. YOU COULD BLOW YOUR RIFLE UP AND BLOW YOUR HEAD OFF*****
 
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Between that Ruger M77 MII, which everbody knows can't shoot, and those new fangled lead-free bullets you're lucky to be on paper.;) :)









Hope the TSX shoots like that out of the 30-06 thats on its way to me. Nice shooting, Gatehouse. That load should kill most things that need killin'.


***I like your disclaimer.:) :) ***
 
I have used the TSX in 5 calibers now and with a bit of tinkering I have always been able to get very good accuracy with them. I had the exact opposite experience with some of their predicessors. While I had a couple of rifle sthat sho them well, I had a couple that wouldn't shoot them no matter what.
 
that load will do for anything in north america at distances further than most should attempt, with great accuracy...perfect :cool:
​
 
What length a barrel you got? 3100fps seems a bit slow, does it not?

Not like it really matters - trajectory and power ought to be plenty as is, but still, with a 140 gr bullet, a 280 can easily hit 3100 and Hornady even loads a 7mm08 cartridge at a hair under 3000
 
Gatehouse said:
I often work up a load by firing multiple charges at the same target. This allows me to monitor the velocities, as well as see what charges will fall close together. Then I generally pick the best 3 and experiemnt with them.
Click to expand...

Interesting idea!!

Aside from individually numbering each POI after firing each load, how do you keep track of everything?

I see a nice 12 shot group, but how do you know which one is which? :redface:




 
prosper said:
What length a barrel you got? 3100fps seems a bit slow, does it not?

Not like it really matters - trajectory and power ought to be plenty as is, but still, with a 140 gr bullet, a 280 can easily hit 3100 and Hornady even loads a 7mm08 cartridge at a hair under 3000
Click to expand...

I was getting 3100 with my 7 Rem Mag with 160 gr.

On the other hand, I couldnt get over 3000 with my 280 and 140 Hornady's.
 
SuperCub said:
Interesting idea!!

Aside from individually numbering each POI after firing each load, how do you keep track of everything?

I see a nice 12 shot group, but how do you know which one is which? :redface:




Click to expand...

You have an identical target at the bench. You check through your scope or spottign scope where each bullet impacts, and you record it on the target, along with velocities.

At one point, you will see a pattern. For instance in this target, you see the lower charges at the bottom left,a nd a the powder charges increase, they moe up the pattern a bit. IN the end, they were all goign into the top part, so I'll just pick a powder charge towards the top end.:)
 
prosper said:
What length a barrel you got? 3100fps seems a bit slow, does it not?

Not like it really matters - trajectory and power ought to be plenty as is, but still, with a 140 gr bullet, a 280 can easily hit 3100 and Hornady even loads a 7mm08 cartridge at a hair under 3000
Click to expand...

The barrel is 24"

If you read what I posted, you will see the answer to your question:

I think I will go with a charge in the 71-72gr area, as it shoudl attain approx 3100fps, which will give me good velocity, excellent accuracy and be comfortable to shoot.

I can keep adding powder- Or change to RL22 and get a bit higher velocity. I *can* get a 140gr Bullet to shoot at 3300fps if I wanted to, but what is the point? 1" less drop at 300 and and 2" less drop at 400.

3100-3200fps is plenty to do whatever I can do out to 400 yards or more. It is very accurate, and recoils like a.270.
 
boonerbuck said:
I was getting 3100 with my 7 Rem Mag with 160 gr.

On the other hand, I couldnt get over 3000 with my 280 and 140 Hornady's.
Click to expand...


3100 fps with 160gr bullets and a 7RM is not to hard to achieve, I've done it too.:) :)

3100fps with a 140gr in a 280 is probably leaning on it a bit. I'm sure it coudl be done, of course. What the pressure is is anyones guess. A 280AI canget 3100-3150 without too much trouble, though.:)


Here is Hodgon data for the 280:

140 GR. NOS PART
COL: 3.230"

H4831 58.5 2927 48,500 CUP
H4350 53.5 2918 48,500 CUP
H414 51.0 2867 47,900 CUP
VARGET 45.5 2838 48,100 CUP
H4895 45.2 2830 48,400 CUP

Alliant:

Rem. 3.32 24 Rem. 9.5 Reloder 22 59.5 3,000 57,500 Print this recipe
Rem. 3.32 24 Rem. 9.5 Reloder 15 46.5 2,860 57,700 Print this recipe
Rem. 3.32 24 Rem. 9.5 Reloder 19 57 2,970 58,000 Print this recipe

IMR:

140 GR. SIE SP
DIA: .284"
COL: 3.230"
SR 4759 29.0 2335 51,800 CUP
IMR 3031 44.5 2860 51,900 CUP
IMR 4064 47.0 2905 50,900 CUP
IMR 4895 43.5 2805 51,600 CUP
IMR 4320 43.0 2780 52,000 CUP
IMR 4350 53.5 2975 51,300 CUP
IMR 4831 56.5 3010 51,000 CUP
 
Disgusting, you should throw those things away, I tell you what, send them to me and I;ll throw them away, you shouldn't have to be bothered with them any more.

I was more shocked to see that you were shooting a RUGER and it shot that well
 
boonerbuck said:
Never knew you were recoil shy Gatehouse. You should look at the 7mm/08 maybe or even the 270. I have a nice reduced load for that.

Ever consider the 243?:p
Click to expand...

.243? GRRRR

I'm not particularly recoil intolerant. I've shot lots of heavy kickers:p But there comes a time when you have to weigth the advantages and disadvantages to what youwere doing. Is another 100fps worth the higher pressures when you have an accurate load that will do everyhting that the higher velocity load will do, but with less presssure?:D

In a big game hunting rifle, less pressure is a real good thing, IMHO. Less chance of a problem if you are hunting on a real hot day, etc.:)
 
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