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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
barrel options
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<blockquote data-quote="Wild_Bill" data-source="post: 171409" data-attributes="member: 4785"><p><strong>25 Souper</strong></p><p></p><p>Hi if you want the 25 souper get it built. forget aboul getting 3200fps and settle with whatever velocity you get. The wyats mag box requires the action to be machined back where the space between the trigger and the rem mag box cutout. it is a simple machining operation and I would definatley do it. Get the 9 twist barrel I recommend Lawton Barrels they areamasing in their finish and they shoot unbelievably well without fouling exsesivly.</p><p></p><p>As for the cases if you are moving the shoulder foreward use Lapua 308 cases they can be sized in one operation in your sizing die. Buy your cases and dies then make up spme cases seat the projectiles to your maximum oal then send one to Dave Kiff and have him grind your reamer to suit.</p><p></p><p>On the neck diameter have 1.5 thou clearence on each side off the neck making it 3 thou larger than the measured neck of your dummy cartridge. For your throat make tne frebore .2571" don't go bigger this will be the most accurate you can have it. Make then neck length around the projectile diameter .257 and the shoulder can be up to 60 degrees. I have 1 reamer a 338 on the 300 ultramag case with the 60 degree shoulder and have a match 7mm on the 270WSM case being made at the moment. </p><p></p><p>I would look at H1000 and H4831SC as the prefered powders and stay away from double based powders as they are less effected by temperature variations. Also use the CCI BR2 primers as they work verry well with the above powders.</p><p></p><p>Get a 28-30" barrel from Barney and you will have a beautiful cartridge and great long range rifle for medium game. There are also plenty off projectiles around the 117gr to 120gr weight to make this worthwhile.</p><p></p><p>But if you are set on 3200fps the 284 case is a better option.</p><p></p><p>Cheers Bill</p><p>Australia</p></blockquote><p></p>
[QUOTE="Wild_Bill, post: 171409, member: 4785"] [b]25 Souper[/b] Hi if you want the 25 souper get it built. forget aboul getting 3200fps and settle with whatever velocity you get. The wyats mag box requires the action to be machined back where the space between the trigger and the rem mag box cutout. it is a simple machining operation and I would definatley do it. Get the 9 twist barrel I recommend Lawton Barrels they areamasing in their finish and they shoot unbelievably well without fouling exsesivly. As for the cases if you are moving the shoulder foreward use Lapua 308 cases they can be sized in one operation in your sizing die. Buy your cases and dies then make up spme cases seat the projectiles to your maximum oal then send one to Dave Kiff and have him grind your reamer to suit. On the neck diameter have 1.5 thou clearence on each side off the neck making it 3 thou larger than the measured neck of your dummy cartridge. For your throat make tne frebore .2571" don't go bigger this will be the most accurate you can have it. Make then neck length around the projectile diameter .257 and the shoulder can be up to 60 degrees. I have 1 reamer a 338 on the 300 ultramag case with the 60 degree shoulder and have a match 7mm on the 270WSM case being made at the moment. I would look at H1000 and H4831SC as the prefered powders and stay away from double based powders as they are less effected by temperature variations. Also use the CCI BR2 primers as they work verry well with the above powders. Get a 28-30" barrel from Barney and you will have a beautiful cartridge and great long range rifle for medium game. There are also plenty off projectiles around the 117gr to 120gr weight to make this worthwhile. But if you are set on 3200fps the 284 case is a better option. Cheers Bill Australia [/QUOTE]
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