vertical stringing

[little bill]

rem.700 varmit sp. 22/250 strings shots vertical inside a 1in. square at 100yds. everthing is tight, could it be barrel temp.?

[Rogue Ram]

Yes, combined with bedding. Is the barrel contacting the bottom of the forearm?

Likely your answer. My Mountain rifle strings slightly horizontally with a floated barrel, barrel is real skinny. In my case I live with it. It shoots minute-of-deer  :-)   and if I do my part will put 4 shots in about half inch with the 5th opening it to an inch or a little more.

How big are the groups?  An inch?

 

RR

[drags]

It could be your benchrest shooting technique, go to benchrest central and check Speedy Gonzalas article in vertical string. WWW.benchrest.com

[little bill]

the bbl. is free floating in stock to recoil lug( composite stock). the group is a vertical string ,shots touching. 1 in. long. the bbl. is heavy fluted stainless.I must try shooting in cooler weather  thanx for your advise.

[260 AAR]

Try a different primer. This does the trick sometimes.

Aloha, Mark

[Woodchuck Sniper]

My 2 cents for the 22-250.

If your still sub moa ( "inside 1") for 5 shot groups.  Don't float,bed or anything yet.

Look at; Barrel heat,cleaning method to keep in the groove,shooting tech.,ammo or loads used,head winds.

They heat up fast being a hot rod.  Some copper fauling is the norm.  Mine liked to be cleaned at 15-20 rounds for best bench accuracy.  Even with my heavy barrel a full minute between shots along with a full 5-10 minute cool down after 3-4 / 5 shot groups kept the best groove for "bench" accuracy.  Many shoot in the .6's and low .7's 5 shot average once you learn the groove it likes.

[beemanbeme]

I was having the same problem and a bench rester said to add .5 or 1 more gr of powder.  I agree that you shouldn't do any sort of drastic changes to your set up. 

[303Guy]

I was having the same problem and a bench rester said to add .5 or 1 more gr of powder.  I agree that you shouldn't do any sort of drastic changes to your set up. 

A gun builder told me once that if the bullet exits the muzzle in the middle of a harmonic, you will get stringing so adding that bit extra powder (or reducing it) should get the bullet to exit at the end of a harmonic, producing tighter groups.  Changing the primer could produce the same result.

303Guy

[DalesCarpentry]

I was having the same problem and a bench rester said to add .5 or 1 more gr of powder.  I agree that you shouldn't do any sort of drastic changes to your set up. 

A gun builder told me once that if the bullet exits the muzzle in the middle of a harmonic, you will get stringing so adding that bit extra powder (or reducing it) should get the bullet to exit at the end of a harmonic, producing tighter groups.  Changing the primer could produce the same result.

303Guy

Wow I have to say that is intresting!!!!!!

[Brithunter]

Hmmmm it's not really surprising when you think it through logically.

    Imagine the barrel as a pendulum. At the end of it's stroke it's momentarily stationary just before moving back in the opposite direction. Now if you release something at that ppint is should fall in the same place whilst swinging the swing imparts movement in a sideways direction so unless the release is exactly the same every time you get a spread in the fall. So a bullet exiting at the top or bootom of the sine wave of the barrel movement will be more consistant than a bulelt exiting in the middle.

[saltydog]

Sounds like barrel - stock contact issue. I had a model 7 223 that would put first shot dead on but after 2 quick shots it began to wander to about 4-5 MOA. I made sure it was relieved but did not help. It was great to carry as a lightweight rifle but I replaced it with 700 BDL.   

[LaOtto222]

I am with some of the others. Try different load of powder. Add a little if not at max or a little less if at max pressure and or try a different primer. I have had small 224 caliber rifles vertical and changed just .4 grains of powder to make a nice round hole out of a vertical oval.  BTY contrary to a lot of others I have found REM 7 1/2 primers better than CCI BR4 primers in many cases, never worse