Forums
New posts
Search forums
What's new
Articles
Latest reviews
Author list
Classifieds
Log in
Register
What's new
Search
Search
Search titles and first posts only
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Rifles, Reloading, Optics, Equipment
Gunsmithing
What is the verdict on this barrel?
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="DJ Fergus" data-source="post: 1844586" data-attributes="member: 93895"><p>I have a 7mm stw burning 80.4 grains of n570 behind a 180 eld in a 28" @ aprx 3180fps. I've got around 130 rounds on it. So far, carbon hasn't been as bad as a 26" 300 Norma I have with n570. To get rid of most stubborn carbon: I take an soft foam disposable earplug, roll it up small & stick it in the muzzle. Put the muzzle in a plastic cup vertical, safe & secure place. Fill the bore up to the chamber with bore tech carbon remover. I've let it set up to 5 days in the chamber. Drain & start patching with dry patches untill they come out clean. Go back with bore tech soaked patches & see if you get any more carbon. You shouldn't get much at all. If you do push a couple more dry patches following with some wet ones, but you probably aren't going to have to do that. I can tell you that bore tech carbon remover will turn carbon into a soft mush after setting in it for 3-5 days. After a thorough cleaning like that, you may not want to run full charge loads until you get two or three rounds through. Also, it's been accepted that n570 speeds up if it's set out unsealed for several days. I also never load up much more than 15-20 rounds for a rifle at a time. That way if something changes, I don't have a bunch of loaded ammo that's not in tune with the state of my barrel. I'm guessing after 400 rounds, it's greatly possible you have some carbon build that's causing your higher pressure.</p></blockquote><p></p>
[QUOTE="DJ Fergus, post: 1844586, member: 93895"] I have a 7mm stw burning 80.4 grains of n570 behind a 180 eld in a 28" @ aprx 3180fps. I've got around 130 rounds on it. So far, carbon hasn't been as bad as a 26" 300 Norma I have with n570. To get rid of most stubborn carbon: I take an soft foam disposable earplug, roll it up small & stick it in the muzzle. Put the muzzle in a plastic cup vertical, safe & secure place. Fill the bore up to the chamber with bore tech carbon remover. I've let it set up to 5 days in the chamber. Drain & start patching with dry patches untill they come out clean. Go back with bore tech soaked patches & see if you get any more carbon. You shouldn't get much at all. If you do push a couple more dry patches following with some wet ones, but you probably aren't going to have to do that. I can tell you that bore tech carbon remover will turn carbon into a soft mush after setting in it for 3-5 days. After a thorough cleaning like that, you may not want to run full charge loads until you get two or three rounds through. Also, it's been accepted that n570 speeds up if it's set out unsealed for several days. I also never load up much more than 15-20 rounds for a rifle at a time. That way if something changes, I don't have a bunch of loaded ammo that's not in tune with the state of my barrel. I'm guessing after 400 rounds, it's greatly possible you have some carbon build that's causing your higher pressure. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Gunsmithing
What is the verdict on this barrel?
Top