300 Rum accuracy question?

[ALLOUTIND]

Kinda new to this reloading thing so bare with me.

I have a Rem 700 Sendero 300 ultra mag , I started making loads for it and found a pretty good combo. I was shooting .50 at 100 yrds (5 shot group) also pulled a 1.25 group (5 shot)at 300 yrds. Everything was great.... Well i made a bunch of that same ammo and took the gun to 500yrds. I couldnt get any group better then 6 inches.
I WAS STUMPED!!
So i went home and made another 25 bullets. I went out with my buddy and shot 500yrds again.....
Same results!!
I dont know if it is possible to have a great reload fall apart at 500yrds or ?

The only thing that i changed.....

(After shooting great at 100 and 300.)

I swapped out my stock to see how another felt.I did not shoot the gun with the new one. I just swapped it to check it out. Then i put mine back on to shoot the next day.
im wondering if this could have caused accuracy issues?

Help?


I did post this ad on another site to get other feed back..

[GeoffLinder]

If the barrel is free floating (not touching stock after the receiver) it should shoot the same afterwards IF you tightened the bedding screws about the same.

If the barrel contacts the fore end, even the slightest change in screw torque could have major changes in the way the barrel reacts to a specific load.

[ALLOUTIND]

It is free floating , I had my buddy at J n R gun shop take it apart and torque it the correct way.. just waiting to shoot it sunday..

If the barrel is free floating (not touching stock after the receiver) it should shoot the same afterwards IF you tightened the bedding screws about the same.

If the barrel contacts the fore end, even the slightest change in screw torque could have major changes in the way the barrel reacts to a specific load.

[GeoffLinder]

Using a micro-torque wrench to duplicate the same setting every time is a good idea IMHO. Just like torquing head bolts on a cylinder, little bit at a time until they are all at the correct setting and using the same tightening pattern makes sure the action gets seated the same way every time.

[ALLOUTIND]

Yeah i think this might be a tough lesson i have learned. i just found a torque
wrench on midway.
any feed back on this one?

http://www.midwayusa.com/viewProduct/?productNumber=718023

Using a micro-torque wrench to duplicate the same setting every time is a good idea IMHO. Just like torquing head bolts on a cylinder, little bit at a time until they are all at the correct setting and using the same tightening pattern makes sure the action gets seated the same way every time.

[CSACANNONEER]

I have to ask. Are you used to shooting 500 yards? Could there be a "condition" between 300 and 500 that you're not seeing? Are you getting vertical or horizontal stringing? Or, are your shots all over?

[ALLOUTIND]

I have a few guns and have shot many times at 500 yrds. I can grab my other gun and pull a 2.75 (5 shot group at 500)

whats really weird is i pulled a 1.25in 5 shot group at 300 yrds the week before.
I though maybe i was having a ruff day. so i loaded 25 more bullets for the next day and invited a few of my buddys out. They are really accurate shooters also and we had the same results.
The bullets seem to be all over.
Very little wind , and there is no pattern ..
any other ideas?

I have to ask. Are you used to shooting 500 yards? Could there be a "condition" between 300 and 500 that you're not seeing? Are you getting vertical or horizontal stringing? Or, are your shots all over?

[GeoffLinder]

Yeah i think this might be a tough lesson i have learned. i just found a torque
wrench on midway.
any feed back on this one?

http://www.midwayusa.com/viewProduct...tNumber=718023

That looks like a good choice for firearms dedicated work. I already have a Craftsman MicroTork for working on motorcycles so that's what I use.

[CSACANNONEER]

I have a few guns and have shot many times at 500 yrds. I can grab my other gun and pull a 2.75 (5 shot group at 500)

whats really weird is i pulled a 1.25in 5 shot group at 300 yrds the week before.
I though maybe i was having a ruff day. so i loaded 25 more bullets for the next day and invited a few of my buddys out. They are really accurate shooters also and we had the same results.
The bullets seem to be all over.
Very little wind , and there is no pattern ..
any other ideas?

Little to no wind has screwed me up before. I've caught thermals which have dropped my shots 18" at 1000 yards. But, since you're not experiencing vertical stringing, that's out. Obviously, you're not experiencing a change from supersonic to subsonic nor were you just having a bad day. maybe the load you're using just doesn't like going past 300??? What bullets are you using? Have you tried a different bullet and or load?

BTW, Since others have pointed out possible problems with the gun, I've just stuck with the possibility of it being something else.

[ALLOUTIND]

I am using barnes tsx 168 gr , I am going out tomorrow with 2 other options on bullets. we will see what happens .. i will keep you posted.

Little to no wind has screwed me up before. I've caught thermals which have dropped my shots 18" at 1000 yards. But, since you're not experiencing vertical stringing, that's out. Obviously, you're not experiencing a change from supersonic to subsonic nor were you just having a bad day. maybe the load you're using just doesn't like going past 300??? What bullets are you using? Have you tried a different bullet and or load?

BTW, Since others have pointed out possible problems with the gun, I've just stuck with the possibility of it being something else.

[ALLOUTIND]

good thing i didnt buy the one from midway...my wife got it for me for
X-mas .... I just used it a few minutes ago.,,. pretty cool

That looks like a good choice for firearms dedicated work. I already have a Craftsman MicroTork for working on motorcycles so that's what I use.

[ALLOUTIND]

Went out today to shoot... i didnt even pull the 300 rum out. we shot squirels with the 22-250..
lol maybe next week...

[ALLOUTIND]

Im dropping off the gun at anthony's precision rifle to get it bedded..