Changing brands of ammo

[JasonYuke]

Was at the indoor range tonight shooting some bench rest targets and playing with different ammo,

BTW RWS Target rifle ammo is good, but what i noticed after shooting one brand to the other it was almost like you needed 3-4 shots of the new ammo
for it to shoot consistant with out flyers..

Anyone ever find this,,,,

After i notice it I confirmed it I would shoot five than switch,, and teh first 2-3 out of the new brand always threw flyers.

 

[Farlsincharge]

Mentioned on here a few times and I have noticed it myself. I usually do some cleaning when playing with different ammo's. I have heard it has to do with the bullets coatings. Wether or not that is true, I don't know.

 

[cyclone]

....but what i noticed after shooting one brand to the other it was almost like you needed 3-4 shots of the new ammo
for it to shoot consistant with out flyers..

Anyone ever find this,,,,

The short answer is that the lube/grease/residue from each ammo type needs to be considered.

This means that (1) there will be the residue from the first brand in the barrel to consider (as a factor affecting the second brand), as well as (2) the fact that you will need to re-foul the barrel with the residue from the "new" brand of ammunition you'll be firing.

The re-fouling is to effectively "coat" the barrel in the residue of the new brand; follow this and you'll lose the fliers (that result from residue issues).

One more note: this means that, even if you boresnake the barrel after the first brand of ammo, you'll still need to re-foul with the 2nd brand of ammo (these are actually called "fouling shots").

 

[manitou210]

Clean gun with rod and Hoppe's then dry patch barrel, fire at least 5 Eagleye does 10 he knows Rimefires then shoot for groups, every time you change ammo brands.

 

[Jefferson]

if you start from a completely clean gun

and it is a good target gun then you will need about 1 shot for every 1 inch of barrel to completely foul it and "SEASON" or reseason it for proper groups to occur,

what is really neat is wasting a bunch of ammo to try this, you can actually see the 3 or 4 or 5 shot groups form closer and closer,

sometimes it does not work to see the closing in of groups,

what is really neat is some guy had a thread on the hopewell method of tuning a rifle with a tuner and it showed the groups as he moved the tuner,
made the explantion seem really simple as you saw what was happening as opposed to voodoo science or folks spouting off internet BS

rimfire is really neat but can be frustrating as well

Jefferson

 

[JasonYuke]

Yes I do not have a fancy expensive rifle but i do have a shooter, I bought a MK II BTVS that shoots realy good for a 400 dollar gun. I was out wih it last night at 25 m and it will shoot .1s with RWS Target Rifle ammo.

But again I tryed a bunch of new target ammo and it is proven to me anyway that you suggestion of 1 inch per fouler shots seems right, I shot 6 groups of 5 on a prove it target as i moved from left to right the grpuops shot best on group 5..

 

[Eagleye]

I heartily agree that you must shoot a goodly number of shots to re-foul a barrel after it has been cleaned or you change to a different ammo. This is apparent in practically any decent rimfire rifle that you are using. A shot for each 1 -1½" of barrel length sounds pretty close. Regards, eagleye