7mm STW Reloading Thread

[80 grains]

Im new to the group but not to the caliber.

Remington Sendero SF...all factory with a new Swarovski Z5 5-25x52 with the brh reticle. I've loaded mostly with 7828 and 140 grain ballistic tips.

Im attempting to get my brass inventory to a comfortable level and im always searching and finding as opportunities arise.

I love the thunder of the Stw!

 

[MudRunner2005]

I'd simply start 10% down (maybe a bit more- I don't know that bullet as I don't shoot Berger) and work into it. I'd guess a top within a grain or two.

Thanks, I might give it a shot, if they still have some left come payday. Buying that brass yesterday kinda wiped out my fun-fund till payday. LOL

 

[MudRunner2005]

Im new to the group but not to the caliber.

Remington Sendero SF...all factory with a new Swarovski Z5 5-25x52 with the brh reticle. I've loaded mostly with 7828 and 140 grain ballistic tips.

Im attempting to get my brass inventory to a comfortable level and im always searching and finding as opportunities arise.

I love the thunder of the Stw!

Post up some pics...Bet that thing is nasty! gun)

 

[moto450]

I have a sako with a 26 inch barrel that loves 150 sierra boatails with 80 gr 7828 COAL 3.7 It also likes 162 sst and h1000 My gun hates reloader 22-25

 

[80 grains]

Post up some pics...Bet that thing is nasty! gun)

Gosh man I'm still learnin how to reply on here. Lol

I'll get some pics as soon as i can tho.

 

[80 grains]

Well, we have our own STW section now, we might as well start our own 7mm STW reloading thread.

Let's see what favorites are out there.

Please include what firearm you are using, including barrel type , length and twist.
Also include info for brass, bullets, primers, powder, charge weights, OAL, etc.
If you have a chrono, let use know the speeds you are getting.

Don't forget, anyone reading this, hand loading can be dangerous if done improperly.
Please view loads listed and a guideline and treat any load you find listed as if it is too hot for your rifle, and safely build up loads for your own firearm.
**Just because someone is using the same firearm you are, does not automatically make their loads safe for your firearm**

Be safe!

How do i upload photos?

 

[MudRunner2005]

If you don't have a PhotoBucket account, get one. It's fee and easy to setup and use (also set your accounts to private, which I do b/c I don't want my pics all over the place and popping up on people's google searches and stuff).

Once you do, you simple click on the picture you want, then on the right-hand side of the screen you click on the box that says "IMG Code", which stands for Image Code, and it will highlight and say "copied". Then you come back to the forum, right click in the reply box and select "Paste". And it will paste the image code into the dialogue box. Then you hit "Submit Reply", and it posts your picture.

 

[80 grains]

Well, we have our own STW section now, we might as well start our own 7mm STW reloading thread.

Let's see what favorites are out there.

Please include what firearm you are using, including barrel type , length and twist.
Also include info for brass, bullets, primers, powder, charge weights, OAL, etc.
If you have a chrono, let use know the speeds you are getting.

Don't forget, anyone reading this, hand loading can be dangerous if done improperly.
Please view loads listed and a guideline and treat any load you find listed as if it is too hot for your rifle, and safely build up loads for your own firearm.
**Just because someone is using the same firearm you are, does not automatically make their loads safe for your firearm**

Be safe!

I am wondering why it says on the box of Sierra 180 gr hpbt 8" twist or faster?

 

[etisll40]

Awesome Topic.

 

[Fire306]

I am wondering why it says on the box of Sierra 180 gr hpbt 8" twist or faster?

Bullets require a certain spin rate to stabilize them in flight. A general rule of thumb is, the heavier (usually longer) the bullet the faster it will need to be spun to stabilize it. The Sierra 180gr you speak of, the manufacturer is recommending 1-8" twist in the barrel as a minimum requirement.
The lower the number, the faster the twist.
1-12 is a slower twist rate than 1-10 for example.
This means in a 1-12" barrel, the bullet will be turned 1 full revolution in 12" of barrel travel. A 1-8" it happens in 8"

Hope that helps.

 

[80 grains]

Awesome Topic.

The 180 gr has such a bc i think its worth a try, but a 9" twist is most common for 7mm calibers. I would think a 9" would be a little better for the 180.

 

[80 grains]

Bullets require a certain spin rate to stabilize them in flight. A general rule of thumb is, the heavier (usually longer) the bullet the faster it will need to be spun to stabilize it. The Sierra 180gr you speak of, the manufacturer is recommending 1-8" twist in the barrel as a minimum requirement.
The lower the number, the faster the twist.
1-12 is a slower twist rate than 1-10 for example.
This means in a 1-12" barrel, the bullet will be turned 1 full revolution in 12" of barrel travel. A 1-8" it happens in 8"

Hope that helps.

Alright...so 8" is the minimum? Cool! I read an article in one of the manuals that stated the 7mm stw takes at least 100 yds to stabilize with anything lighter than 160, but the heavier bullets stabilize quicker.

 

[Lefty7mmstw]

Alright...so 8" is the minimum? Cool! I read an article in one of the manuals that stated the 7mm stw takes at least 100 yds to stabilize with anything lighter than 160, but the heavier bullets stabilize quicker.

They stabilize right away, but the yaw doesn't always settle (go to sleep) out until around 150 yards. Think of a kids top chattering a bit as it lands. It's still stable, but it isn't settled yet.

 

[80 grains]

Lle

They stabilize right away, but the yaw doesn't always settle (go to sleep) out until around 150 yards. Think of a kids top chattering a bit as it lands. It's still stable, but it isn't settled yet.

Im waiting on some powder to arrive for this bullet. I was going try Us869. I wanna be sure the twist recommendations weren't a road block.