For those that have followed my .257 Weatherby story you know my frustrations, for those that haven't it can be found with a simple search of my user name.

Anyway, I finally got a chance to see what the new Fibermark stock would do for me. I screwed it on "stock" to see what it would do before bedding, floating etc.

In addition to putting the new stock on, I cleaned the begeezers out of the barrel to make sure it was down to the bare metal before trying to do load work up with the 100 grain Barnes TSX.

Following are four of the groups I fired with the gun the other night. The groups with "4831" on them are the IMR version.

None were remotely acceptable, but how about the target with 76.5 grains of RL25...two bullets making one hole and then one 6 inches to the right...holy smokes

So, what is going on with this beast? I am getting mighty frustrated with this smokepole...almost to the point of throwing in the towel on it.

All groups were fired at 100 yards. The smallest group was right at 2" CtoC with the 75.5 grains of RL25.

I am inclined to believe a loose mount,bad ring,or the scope is toasted.Two holes touching and a major flyer is probably not the shooter.Try another scope.

I am inclined to side with Mcburger, you have either a loose base, loose ring/scope or a bad scope. Switch to a scope that is a "known" good shooter from another rifle and retry that powder bullet combo that gave you two touching.

Of course after dis-assembling and re-assembling the bases, rings etc...

I'd say you have something loose. Tighten everything down and glass bed the action. Also, try crimping your reloads if you don't already.

I checked Lymans 48th and it seems you at at or above max load with at least the RL25 with a 100gr conventional bullet.

Dont know about copper solid bullets....no data.But someone is quite likely to have shot the 100gr/257 Weath Mag on this forum and will know.

I know that my .257 WBY won't group at all, until I've put at least 20 rounds through it. Then I leave it that way without cleaning until the groups begin to open up again.

What kinds of groups have you achieved with factory loads? I've found the 257 WBY to be an extremely finicky round when handloading. I had pretty decent groups (<1") with 100 gr. swift a-frames. I haven't found the magic loading yet for 100gr TSX. I get 1.5" with Norma brass, 100gr. TSX, 72gr R22 and a COL of 3.200

FYI:
I bought a box of Weatherby factory 100gr. TSX that I'll try next time at the range. They measure 3.115 with a noticeable crimp.

300 winnie,
comming in here late but here gos.
did you buy this rifle new or used.
why is your barrel so carbon fouled.
two tight shots show that she wants 2 shoot.
hows your trigger set.
what kind of rest are you shooting off of.
whats your scope.
have you tried barnes cr-10/with a plastic bruch in 6.5 cal.
cooper fouling from normal bullets can and does copper wash barrels on small high speed magnums.
are you mixing brass makes.
barnes manul #3 really likes reloader -22 big time.
when you glass bed your new stock '' bed the whole action.
are you jumping your bullets .50 thousands barnes of course.
no punn intended.just trying to help.
regards