7mm STW Reloading Thread
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DHanisKid
Active Member
According to Weatherby, 1 in 10
OFFISHN
Well-Known Member
Not a professional and I'm still learning but with a 1-10 I would go with a 145-150gr pill. Tops
DHanisKid
Active Member
Yes, I've read some debate on suitability of twist rate for bigger projectiles, but a good many say not a concern. I will go both directions to see for myself.
DHanisKid
Active Member
https://www.ballisticstudies.com/Knowledgebase/7mm+Weatherby+Magnum.html
Seems to say even the 180 VLD is a good performer in 7 Wby, so in theory should be even better in STW? The whole twist, velocity and long throat jump, yaw info is interesting but confusing. And, since my barrel is rechambered, it may no longer have the characteristic long throat...
Seems to say even the 180 VLD is a good performer in 7 Wby, so in theory should be even better in STW? The whole twist, velocity and long throat jump, yaw info is interesting but confusing. And, since my barrel is rechambered, it may no longer have the characteristic long throat...
WildRose
Well-Known Member
For the 160's I'm running between 77.0-78gr in three different STW's with excellent accuracy.
WildRose
Well-Known Member
You probably need to stick to the 150's then for best accuracy and optimal stability.
That's the problem with older factory twist barrels.
WildRose
Well-Known Member
Nobody that knows what they are talking about. Either a bullet will stabilize at a given twist rate or it won't and when you go below the recommended minimum you're buying a lifetime of aggravation and problems.
DHanisKid
Active Member
Thanks WR.
Any suggestions on what 150's to go with, what powder and what fps to expect? I have inexpensive Hornady Ballistic Tips in 150 coming, as well as some 175's. I've read 140's are not as accurate or as deadly. Seems like 150 Swift Scirocco IIs are popular...
Any suggestions on what 150's to go with, what powder and what fps to expect? I have inexpensive Hornady Ballistic Tips in 150 coming, as well as some 175's. I've read 140's are not as accurate or as deadly. Seems like 150 Swift Scirocco IIs are popular...
WildRose
Well-Known Member
I killed many truckloads of game and coyotes with the 140's and 150's, mostly shooting old Winchester Supreme with the CT tech bullets and hornady Interbonds.
Find a load it likes and don't worry about the weight. If you are shooting a decent bullet out to 600yds you won't know the difference.
Forget the 175's you have no hope of stabilizing them, see if you can swap them for some lighter bullets. With a 1:10 twist even the 160's are out of bounds.
Give these a ride and see how they work.
https://www.hornady.com/bullets/rifle/#!/
139-154gr Interbond
There's been a bunch of critters killed and a ton of Sub.5 groups on this thread with the 140 CT's and I mean a ton
7stw
Well-Known Member
Ohhhhhhh, if yours Iis 1-10, you may have issues with longer, heavier bullets.
Try a 145lrx, Barnes. It has the mass of a 150 ish weight, but it'll stabilize, and speed will be around 3400 ish. Whitetail killin machine. And I'm thinking no elk would carry it far EITHER!
Wasnt even thinking about your twist. Assumed it was 1-9
WildRose
Well-Known Member
That's going to be way too long for a 10 twist. Remember they are about 10% longer than conventional bullets.
140 CT'S I say, Backed with about 82gr of RL25 and she'll spin up real nice
