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Author Topic: 7 STW BARREL  (Read 1923 times)

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Offline jp600rr

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7 STW BARREL
« on: November 16, 2009, 01:34:34 PM »
DOES ANYONE OWN A 7mm STW BARREL, OR HAS ANYBODY EVER SEEN ONE? I AM CONSIDERING HAVING ONE BUILT OR RECHAMBERD. THE PRESSURES IT OPERATES AT, ARE NOT ANY HIGHER THAN SOME OF THE OTHER MAGNUM CALIBERS AND WILDCAT ROUNDS THAT ARE ALREADY AVAILIBLE FOR THE ENCORE. I AM INTERESTED IN YOUR THOUGHTS AND COMMENTS OR SUGGESTIONS.
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Offline Encore28

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Re: 7 STW BARREL
« Reply #1 on: November 16, 2009, 02:21:45 PM »
I am not 100% sure BUT would guess the head pressure is in the danger zone and that is why T/C will not offer it.
I would check with MGM and/or Bullberry to see if they chamber the 7mm STW.
Good Luck

Encore28
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Offline Hopalong7

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Re: 7 STW BARREL
« Reply #2 on: November 17, 2009, 12:43:21 AM »
    Chamber pressure is only part of the equation.  I've never heard of a barrel chambered in that round and really can't imagine it being safe.  IF...it is...this ole man wants no part of it in his Encore!   OUCH!!!
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Offline IOWA DON

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Re: 7 STW BARREL
« Reply #3 on: November 17, 2009, 02:47:53 AM »
The base of the 7 STW is the same as the .338 Win Mag or .300 Win Mag. The point is that they are both high-pressure cartridges so if one can have a barrel in the two winchester cartridges on should be able to have a barrel in 7 STW.
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Offline Silvertp

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Re: 7 STW BARREL
« Reply #4 on: November 17, 2009, 06:18:15 AM »
No comments on the "pressure / compatability of the round /rifle" but if you go for it try the 28" length bbl.  That along with a case of slow burning powder and a quality 160 grain hunting bullet will give you an ultimate long range hunting set-up.  Ive been a 7mm mag fan since 1970 and I have seen what a big 7 can do on game...

Good luck on your project.  Oh,...just curious, what are you planning to use this rifle / chambering for????

Silvertp

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Offline quickdtoo

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Re: 7 STW BARREL
« Reply #5 on: November 17, 2009, 06:27:53 AM »
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Offline Encore28

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Re: 7 STW BARREL
« Reply #6 on: November 17, 2009, 12:11:19 PM »
I knew MGM would offer it.
I am leary of those big calibers in a break open action!! JMHO
I always wanted a .257 Weatherby Mag BUT was concerned with the pressure. There are guys out there who will make one(ie--MGM)but I will pass.

Just because someone will make it does not mean it is right!! JMHO(again)



Dave
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Offline jp600rr

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Re: 7 STW BARREL
« Reply #7 on: November 18, 2009, 02:13:58 AM »
I HAD NOT CHECKED MGM OUT YET, BUT I FIGURED THEY WOULD CHAMBER IT IF ANYBODY DID. I WAS PLANNING ON A 28'' BARREL, SO THE EASIEST ROUTE WOULD BE TO RECHAMBER A PRO HUNTER BARREL AND MOST LIKLEY THE LEAST EXPENSIVE. AS FAR AS THE PRESSURES GO FROM WHAT I HAVE SEEN IT IS RIGHT THERE WITH THE OTHER BELTED MAGNUMS. I KNOW THAT SSK CHAMBERS SOME OF THE WEATHERBY MAGS IN THE ENCORE, AND I HAVE SEEN VVC AND MGM BARRELS IN ULTRA MAG CALIBERS WHICH I AM VERY LEARY OF IN A ENCORE PLATFORM. AS FAR AS RECOIL GOES IT CERTAINLY CANT KICK ANY HARDER THAN THE FACTORY PROHUNTER BARREL IN 416 RIGBY. AND THE CUSTOM SHOP OFFERS THE 416 REM MAG. I REALLY APPRECIATE THE INPUT GUYS.
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Offline jbaldwin

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Re: 7 STW BARREL
« Reply #8 on: November 21, 2009, 02:42:22 PM »
There was a picture of a Encore a while back that was blown a to pieces from a STW.  I'm looking for it now.  Will post if I can find...
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Offline jp600rr

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Re: 7 STW BARREL
« Reply #9 on: November 24, 2009, 02:31:50 AM »
I have ordered a 7 mag prohunter bbl and am going to have it rechambered. I have done quite a bit of researching loads, and plan on handloading my own for it. I do not plan on firing factory ammo through it. I have found quite a few loads for this caliber that are under 50,000 psi. that offer better ballistics than 7mm mag. and all of the loads that I have found are under 52,000 psi. which is less pressure than some of the loads that are for the 7mm mag.
This is going to be a project bbl for extended range whitetail, mule deer and pronghorn hunting.
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Offline Silvertp

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Re: 7 STW BARREL
« Reply #10 on: November 24, 2009, 04:15:26 AM »
JP...I can relate to what you are doing.  With the 28" barrel and the 7mm STW chamber you should be able to get the most out of those long slick 7mm bullets.  The flat trajectory and wind bucking capability will really help in actual field / hunting conditions. 

You will have a beanfield / rolling plains rifle for sure!

Good shooting to ya.

Silvertp
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Offline sk330lc

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Re: 7 STW BARREL
« Reply #11 on: November 27, 2009, 05:46:20 PM »
 
According to SSK's web Sight. "He feels it is safe to chamber. Any cartridge with the same head diameter as the 300 Winchester Magnum and in the same pressure Range."   Maximum pressure for the 300 Win MAG is 62,366 psi (430.00 MPa) Maximum CUP is 54,000 CUP.  There is no SAAMI Pressure limits for the 7mm STW. Although most Reloading manuals Like (Accurates) list it at the 65,000 psi Range As Max.  Just food for thought!
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Offline jp600rr

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Re: 7 STW BARREL
« Reply #12 on: December 01, 2009, 03:16:53 PM »
I DROPPED OFF THE 28'' PROHUNTER BARREL AT THE GUNSMITH'S YESTERDAY TO BE RECHAMBERED, AND HOPEFULLY I WILL GET IT BACK BEFORE TO LONG. HE IS LEAVING WED 12/2 TO GO TO AFRICA ON SAFARI. HE BUILT THE BACK UP RIFLE FOR A LADY (TERESSA IS HERE NAME I THINK) WHO IS GOING TO TAKE A LION AND A RHINO WITH A BOW. SHE WAS THE FIRST WOMAN TO KILL A ELEPHANT WITH A BOW.SHE HAS HER OWN OUTDOOR TV SHOW AND THEY ARE FILMING THE HUNT. BUT ANYWAY HE WILL BE GONE FOR COUPLE OF WEEKS SO I WILL HOPEFULLY BE ABLE TO POST SOME RESULTS BEFORE THE END OF THE YEAR. ONCE AGAIN I REALLY APPRECIATE EVERYONES INPUT AND COMMENTS ON THIS PROJECT.
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Offline jde650

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Re: 7 STW BARREL
« Reply #13 on: December 07, 2009, 04:23:12 AM »
 :)I have a pro hunter 28" barrel from MGM. Shoots great I'm getting 3190 fps and 1.25 inch groups with 77 grains reloader 25. It has a muzzle brake and very comfortable to shoot.
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Offline jde650

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Re: 7 STW BARREL
« Reply #14 on: December 07, 2009, 04:25:22 AM »
 ;D Sorry!  Thats with a 162 grain sst.
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Offline jp600rr

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Re: 7 STW BARREL
« Reply #15 on: January 13, 2010, 05:29:27 AM »
Just want to keep everybody updated on the project.
I have the barrel back from the gunsmith,it looks great, but have not had time to shoot it yet.
Too cold and windy as well. I have put together test ammo, and mounted the scope and everything is ready to go. I am using a Weaver extreme 2.5-10X56 30mm tube scoe and a game reaper scope mount.
so as soon as the weather clears up and warms up a little more I will be at the range testing.
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Offline FredWT

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Re: 7 STW BARREL
« Reply #16 on: January 13, 2010, 10:38:37 AM »
Take some before pics so we can see what it looked like before it let go! ;D

Just kidding about the let go part.
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