What are everyone's thought on this?

I haven't been impressed with the velocity I have gotten. Not much better than 7mm Remy and a lot more powder. I am referring mostly to the heavy bullets here. For elk 160's or 175's

I had one a few years ago, 26" fluted Winny Loredo barrel. I used 7828 and Re 22.

Anyway, couple of years ago I got a LH Mod 70 in 7 STW 26" and have never fired it having got it fo the action to make something else. I haven't fired it, but put a scope on it today and am going to shoot it, I think. In getting ready to do that I found the chamber in the first one was a lot looser than this LH one.

Anyway, what kind of velocity have you guys been getting from this cartridge and the loads to get there?

Nosler's book doesn't show much improvement over the 7mm Remy or Weatherby, that's been a surprise. as well as my chrono readings in the first one.

Does anyone have the "claimed" factory velocity for the STW?

Thanks,

I do not have the data right in front of me, but I too, was quite dissapointed in the only 7mmSTW I worked with. It was a 26 inch Remington 700 Sendero that I tried to work up loads for.

It shot well enough, actually. However, the velocities I got over my chronograph were hardly any better than my 24 inch 7mm Wby Mag, I was not impressed.

I did not load it up till the primers were popping out or anything, just stuck with published data from Nosler, Speer, Hodgdon, etc.
I just could not get the kinds of velocity I had expected out of that thing.

quote:

Originally posted by R Flowers:
I just could not get the kinds of velocity I had expected out of that thing.

I have heard this also.

quote:

Originally posted by ted thorn:

quote:

Originally posted by R Flowers:
I just could not get the kinds of velocity I had expected out of that thing.

I have heard this also.

I've heard that it was not unusual for Layne Simpson to load at insane pressures so it doesn't surprise me that it is hard to duplicate his speeds. Personally, I's rather have the 7mm Weatherby.

Having shot a 7mag for fifteen years before I bought my 7STW,I found out just how good the 7mag is,giving me a little over 3200fps with a 150gr bullet.H-1000 and IMR-7828 was only giving me around 3275-3300fps,about 50-75fps over what my 7mag was doing and it was taking 10-15grs more powder to do it.It wasn't till I used Win. WXR and Reloader-22 that my velocities jumped up to the level it should be,3450fps with a 150gr bullet.I am very happy with the 7STW,it will out shoot my 7mag,but it took a little work finding what worked the best for it.But I look back and it took a little work to figure what worked best for the 7mag too.

I posted an answer in reloading.

Yep, it's called overbore. The 7RUM is even worse. I shoot a 7mmDakota & can get an honest 3200fps w/ 160grNP & IMR7828 in my 26" Ruger #1. That's enough of an improvement over the 3050fps of the 7rem mag to make me keep her & accuracy is all I could ask for from a #1.

I had a 7stw built right after Laynes article came out, using a 700 w/26" Lilja barrel and had no trouble attaining the velocities he reported with zero pressure issues. There are a few tricks, however. One is using fireformed 300 H&H brass by Winchester, which yielded a bit more powder capacity. I was getting over 3500fps w/140gr bullets and 3350 w/160's. I have long since sold that rifle off but I bought a Winchester 70 Classic a bit ago and will have another go at it. If it don't shoot to par, I will rebarrel it to a 404J. I have noticed that the later reloading books use a good bit less powder than the earlier manuals did, not sure why but I have to assume that the earlier loadings had to have been safe to shoot or they would not have published them. I noticed the same thing with the 300 Win mag and H1000 powder. 83gr used to be the max now I think it is 81gr. Go figure.

The 7mm Remington Ultra Mag killed the 7STW.Not that's it's that much better,the 7STW was loaded down so the Ultra Mag would look so much better on paper.Same thing is happening to the 300 Win. Mag.The 300 Ultra Mag came along and the 300 Win Mag is loaded down from what it used to be.I just started loading for a 300 Win Mag and guess what,my groups did not tighten up until I reached the max load published in a couple of my older reloading manuals.That's why I load my own,that way I can load it to it's potential and not the watered down version.

I had a 7mm stw built on a M70 action with a 27" hart barrel. I had no trouble running 140 grainers at 3500 fps, got excellent brass life and no pressure signs. In my opinion it's good for an honest 250 fps over a 7mm rem mag. The reloading data out there is useless for this cartridge, it's one of those that you just have to work up on your own.

My first experience with Hill Country Rifle was a Wby Accumark 7mm STW. Shot mostly Barnes 160 gr TSX over IMR 7828, found great accuracy around 3350 fps--under ½". Could get 3450 fps with 150 gr TSXs not quite as accurate.
Had a few rifles chambered in 7mm RUM. One Sako 75 would shoot 160 AB under ½" over RL-25, again found it around 3350 fps.
Great rifles, never hunted with em.
Lean more towards the 300-338 RUMs.

Phil

I've got a Model 70 Classic S/S in 7-STW.

I've been darned impressed with the velocities I've gotten. But I have not loaded anything above 140gr. bullets. IMR-7828 gives me 3605 fps with a 140 AccBond and zero pressure signs. R22 is a tad slower, but more accurate in my gun. But I got aen eye-opener with R22's sensitivity to varying temps and it sort of scares me now.