7MM STW-140GR

[CZ]

This last saturday started playing with a rifle from a good friend.-
Weatherby MKv action, 28" shilen barrel, magnaported by Bill Wiseman,
stock and bedding by BillW, and teflon coated-Swarovski 4x12 scope.-
Started playing with a load from my friend.- Nosler Ballistic Tip 140gr-h1000 82gr-r/p cases,cci250.- grouped 4 in .699" with some vertical stringing, all ok but when tested in my chrono o deception 3125fps, thats what I get from my 7mm Mag.
Later started playing with some very questionable loads Custom Built in San Antonio Tx IR loads- Nosler 140 AccuBond, r/p cases, powder and primer not known, and I think very $- 2900fps with that load- Thats what they call Custom??
This next week we will start playing with some loads, the rifle has a very good potential, I expect 3300-3350fps with some safe loads.
On the past Ive seen some experiences with the Cal.- any comments.
thanks
j

 

[Antelope_Sniper]

Some of the early load data for the STW was very weak. Much of it was around 44,000 psi. Did they think we were loading this in a Lever action :? Much of the newer loading data is better, but not all of it.

With the 140's you may wish to consider H4831, H450, and RL22. I wouldn't go any faster then those powders. With the 28" barrel, you should also have good luck with the slower powders. WC869 should also work well with the 140's.

 

[DrMike]

I have used Retumbo and 139 grain Hornady InterBonds to yield 3325 fps and good groups, and H4831 with Nosler 140 grain BT to yield 3336 fps and sub-MOA groups. These were in a rifle with a 24 inch barrel. I did not load these to maximum pressures to achieve these velocities. The loads you were using do seem somewhat mild for the STW.

 

[FOTIS]

My best group ever was 80 gr IMR 7828 from my sendero with 140 ballistic tips. Close to 3500 fps and 1.25" 1.5" at 300 yards.

 

[ElkHunter]

7STW with a 27" Shilen
77.0g IMR4831 139gr IntrB Fed215M 3512fps avg. OAL: 3.600
or
75.5gr IMR4350 139gr IntrB Fed215M 3426fps avg OAL: 3.600

these both will cloverleaf in my STW. Looking to try some 160gr Partitions next.

 

[ElkHunter]

BTW....This is what I got out of my 7STW last week with H1000, 139gr Hornady IB's, 8mmRem cases necked down. The velocities are the avg of 3 shot groups
82.0gr H1000 139gr IntrB Fed215M 3328fps OAL: 3.600
84.0gr H1000 139gr IntrB Fed215M 3395fps OAL: 3.600
86.0gr H1000 139gr IntrB Fed215M 3463fps OAL: 3.600
They started to show signs of pressure at 86gr. I would back off to 84gr FOR ME, IN MY GUN.
My best powder had been imr4831. Consistent velocities and good groups.

 

[FOTIS]

CZ...incoming pm

 

[CZ]

CZ...incoming pm

HEY AMIGO THANK YOU VERY MUCH.
STARTED PLAYING WITH THE 7BEE?

 

[FOTIS]

No es nada....




Next week is the 7mm bee party.... :lol:

 

[Ridge_Runner]

My 140 gr load is 86gr. of H-1000 behind a 140 gr BT, yields 3550 fps, this is from a 9 twist 26" lilja, 88 gr gives me 3602 fps but also shows pressure signs with new rem. cases.
RR