Throat burned out or not???

[Orange Dust]

I"ve seen WBY's shoot both the accubond and LRX very well too.

Yes, AB are a very length tolerant bullet in all sizes it seems. Haven't played with the LRX so no comment. The 150gr Ballistic tip is a bomb in a STW but really behaves in a Weatherby. Seems to always be very accurate, and has good terminal performance on game at any sane distance including up close in a 7WBY. Great combo and a good place to start looking with a rifle that misbehaving so far.

 

[johnlittletree]

I might of missed it while skimming this thread but have you bore scoped it or cerro cast the chamber and throat?

 

[WildRose]

I have never been accused of "overthinking" anything before, thanks. My only purpose in the 7mm WBY was for long range (500 - 600yds) and none of the flat based bullets under 160gr lends itself to long range work. If I can only get the accurate groups with bullets that weren't designed for longer range, then I am defeating myself before I even got started. Crappy deal!
I am told by many that the 7mm Rem mag will shoot most all the long range bullets with usually good groups, so why not a weapon that cost +twice that of a Rem 700.
Crappy deal!

Out to 600yds it won't matter enough for you to notice what kind of bullet you're using as long as it stabilizes and shoots MOA or better at 100-200yds.

More often than not the limiting factor isn't the gun, the round, or the bullet, it's the guy/gal behind the gun.

Since they are making them again try the Hornady Interbond.

https://www.hornady.com/bullets/interbond#!/

They perform extremely well at these velocities and come in 140&154gr both of which your rifle should stabilize well.

I shot the 154's pretty well exclusively in my 7mm STW's for about 20-25 years and have never had an Interbond fail me on any kind of game.

 

[WildRose]

Yes, AB are a very length tolerant bullet in all sizes it seems. Haven't played with the LRX so no comment. The 150gr Ballistic tip is a bomb in a STW but really behaves in a Weatherby. Seems to always be very accurate, and has good terminal performance on game at any sane distance including up close in a 7WBY. Great combo and a good place to start looking with a rifle that misbehaving so far.

My experience with the BT's was that they were just way too explosive to suit me in high velocity 7mm's like the STW and WBY. Even with my old 7RM shooting game at 300-400yds they often lost well over 75% of their weight and never exited. That produced a lot of very undesireable results especially on tough game like hogs.

After about a decade of shooting them I found the Interbond and shot it almost exclusively for everything until they took their "pause" in manufacturing them for the roll out of the ELD series.

Fortunately they've gone back to making them and I'm leaning on the people responsible to start producing them in heavier versions. A 140-145g 6.5, 165-175 in 7mm, and 195-215 7.62. I pointed out to them just how much of the long range market and faster twist barrel market they are missing out on by only producing the low to mid weight for caliber bullets and last I heard there is some movement on doing so.

Of all the lead core bullets I've shot over the years it's my favorite because they simply have never let me down.

 

[Orange Dust]

With you on the ability and inter bond. The 150 bt is the only bt I've ever liked on game and only in this cartridge. If hunting elk I would choose the bonded bullet esp if range could be short, however I'm just trying to help the op get his rifle to shoot. If it won't with the comb listed there is more going on. The suggested bullet is great for long range anything or close range for animals up to 400 lbs or so

 

[DUSTY NOGGIN]

.. wbys idea of hellaciously long freebore = less spike pressure. which basically momentum through that swaging transistion. may allow for more velocity . if any increased velocity. it is only a byproduct of them choosing to make a safer , less pressure building rifle.

keep in mind OP says 3" groups also , which likely can be tightened up , how far dont know .. so maybe crown, maybe light contour. maybe loading technique, maybe scope or bedding .. all should be considered before calling it quits .. everything you try is gonna take another batch making that throat even longer but, how much components equal the price new barrel and install ..

I think the straighter you start a bullet the more accurate it can be
. so I think if you can have the brass holding back of bullet in axis line until the straight swage is established, then sealing of the bullet to the barrel . do you think any (even if slight ) gas blow by can happen before the bullet seals completely . is that going to increase erosion??

 

[cape cove]

In my 7mm Wea the only 175 gr bullet that shoots good is the 175 gr Hornady Interlock. The rest just arn't stabalized enough. Another good bullet I load is the 145 Barnes LRX. Both shoot sub moa. The oal I use for both is 3.365 with Norma MRP. My rifle has a 1/10 twist.

 

[Orange Dust]

The only one I currently have belongs to my wife. It is old and round count is high. Still shoots about 3/4" and has killed countless animals including several elk. These are good rifles, just very different from current tech. They will kill a long ways, further than most folks can hit well.

 

[Orange Dust]

In my 7mm Wea the only 175 gr bullet that shoots good is the 175 gr Hornady Interlock. The rest just arn't stabalized enough. Another good bullet I load is the 145 Barnes LRX. Both shoot sub moa. The oal I use for both is 3.365 with Norma MRP. My rifle has a 1/10 twist.

Dont know if they still do but factory loads used to be loaded with hornady interlocks. They shoot very well in these rifles. With the old powders we struggled to equal them in both velocity and accuracy.

 

[dok7mm]

The much safer way to do this without a comparator is to just load some so long they'll barely stay in the brass when they contact the lands.

Smoke them with a candle flame, chamber, extract and measure.

Blindly jamming them all the way into the lands and firing them can create dangerous pressures.

I never said to blindly seat into the lands. The OP said he can't seat to lands, because of the freebore. I was trying to get him to seat appox. a caliber into the NECK and and then adjust SEATING DEPTH in .010" increments. Because he doesn't have a comparator, I suggested he use the OAL. I also warned him not to seat deeper than the bearing surface/ogive junction. Please, if you're gonna quote me, read my post.

 

[ncwg2boatguy]

I'd start .030 off lands and work in. Most 7s in my safe are not jump sensitive.

 

[KS2506]

Why not rechamber to a STW and get rid of the free bore?

 

[PDRENNER]

I think the STW is to long for my mag. Max in my mag is 3.368 and that is touching on both ends. Recoil makes the tips flat.
Went to range yesterday and got lucky. Started out with first group at 3.51". With 3 min between shots I found the 150 Rem Cor-loc would group at 1.70" at 3115 fps. Coal was 3.303. That is the best group to date but still pretty sorry!
Will continue working on coal but still thinking about new barrel maybe in 7mm/300 win mag.
AIRBORNE

 

[Orange Dust]

I think the STW is to long for my mag. Max in my mag is 3.368 and that is touching on both ends. Recoil makes the tips flat.
Went to range yesterday and got lucky. Started out with first group at 3.51". With 3 min between shots I found the 150 Rem Cor-loc would group at 1.70" at 3115 fps. Coal was 3.303. That is the best group to date but still pretty sorry!
Will continue working on coal but still thinking about new barrel maybe in 7mm/300 win mag.
AIRBORNE

You cannot rechamber to STW. The Wby has less body taper and it will not clean up. Tried it and ruined a barrel. Please try what I asked you to try before giving up on the rifle. That OAL is too long. Stick with factory length or close to it if you want to play with OAL.