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
Chatting and General Stuff
General Discussion
Custom Barrel Care at 17X By Jim See
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="john g duvall" data-source="post: 341816" data-attributes="member: 22083"><p>Absolutely right on. I have found that using a brass brush and about 6 draws through the bore is all that is needed to get the copper fouling out followed by a nylon brush with a lighter cleaning solution. The Moly coating paid off for me. Muzzle Velocity for this weapon using exactly 71.2 grains of R-22 and seating the 210 Sierra BTHP Matchkings at .001 comes to 3056-3060 FPS at 600 feet above sea level at 70 degrees. The patch comes out clean. I also double the patches together for the tighter fit through the bore to really get into the groves. This barrel is a "Dan Lilja" (Plains Mont.) heavy barrel "tapered" 30 inch, 6 grove buttoned rifling, gas checked true 308 caliber set on the Rem. 700 large bolt, tweeked with a Sako extractor using the Jewell trigger and is chambered for 300 Win Mag. Akley improved(12-15% more combustion inside the case). The cleaning and accuracy were demonstrated with a three shot .523 inch group at 400 yards on the cross hairs of the target on Sept 9 2009(8 witness signatures) at the Elbert County gun club. These three shots came together after my fifth shot as I was still trying to get the proper powder load. This 3 shot group is a combination. I put two of the three in the hole and Donny Sanders put the other one inside the same hole. We had about a 7-9 MPH 3/4 value wind at the time of the placement. What I am saying is that with a few "sighters" fired before the three shot group the bore is at the point that will give the best results. I have not found any reloading books that give a starting or ending powder load for a 210 grain round...so I "guestimated". When the bore is absolutely clean(first shot) the zero is slightly below the mark. After a little powder build up it improves the accuracy of the weapon. Thanks for your input.</p></blockquote><p></p>
[QUOTE="john g duvall, post: 341816, member: 22083"] Absolutely right on. I have found that using a brass brush and about 6 draws through the bore is all that is needed to get the copper fouling out followed by a nylon brush with a lighter cleaning solution. The Moly coating paid off for me. Muzzle Velocity for this weapon using exactly 71.2 grains of R-22 and seating the 210 Sierra BTHP Matchkings at .001 comes to 3056-3060 FPS at 600 feet above sea level at 70 degrees. The patch comes out clean. I also double the patches together for the tighter fit through the bore to really get into the groves. This barrel is a "Dan Lilja" (Plains Mont.) heavy barrel "tapered" 30 inch, 6 grove buttoned rifling, gas checked true 308 caliber set on the Rem. 700 large bolt, tweeked with a Sako extractor using the Jewell trigger and is chambered for 300 Win Mag. Akley improved(12-15% more combustion inside the case). The cleaning and accuracy were demonstrated with a three shot .523 inch group at 400 yards on the cross hairs of the target on Sept 9 2009(8 witness signatures) at the Elbert County gun club. These three shots came together after my fifth shot as I was still trying to get the proper powder load. This 3 shot group is a combination. I put two of the three in the hole and Donny Sanders put the other one inside the same hole. We had about a 7-9 MPH 3/4 value wind at the time of the placement. What I am saying is that with a few "sighters" fired before the three shot group the bore is at the point that will give the best results. I have not found any reloading books that give a starting or ending powder load for a 210 grain round...so I "guestimated". When the bore is absolutely clean(first shot) the zero is slightly below the mark. After a little powder build up it improves the accuracy of the weapon. Thanks for your input. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Chatting and General Stuff
General Discussion
Custom Barrel Care at 17X By Jim See
Top