What would by your # 1 choice for a custom barrel for a sendero .300 ultra mag shooting 210 bergers. My factory barrel just isn't what it should be IMO. I have tried the 168 bergers with two different powders and am lucky told hold moa consistently. I am going to give the 210s a try and if they don't perform, its time for a new tube.
I would go with a broughton. I have shot them for a long time and have NO complaints. I currently have a .300 RUM with a Broughton 32" 5C 1.45" straight blank barrel that is a 10 twist. It is very heavy, but it helps tame the recoil of the rifle. I get very good results with the Berger 210s and the 155s. I shoot the 210s with 97.5 gr of H-1000 @ 3450 fps and the 155s with 107 gr H-1000 @ 3950. Both of these loads are VERY accurate out to at least 1000 yards. I cant test longer yardages so I dont know. around .3 MOA from 100 to 1000 yards.
Anyway, to get back to your question I would get the broughton with the factory Remington taper, if you like that taper with a 10 twist to stabalize the heavy bullets and just pick the length you want and go from there. I don't think you'll be dissatisfied.
Last edited by BlackKnight755; 12-19-2010 at 02:07 PM.
I wouldn't get any preconcieved notions about which bullet to run, but I would stick with something over 180gr. Using a .300 to push 168gr bullets is like using a Peterbuilt to tow a jet ski. If your rifle doesn't like the bergers than try the 200gr sierra matchkings. Their tangent ogive make them a lot less finicky than the secant ogive found on vlds and amaxs. And for barrel choice, I am in the process of order a 5r 9.5twist kreiger. Just my personal preference.
"I'm interested in rifles, but only accurate rifles are interesting". Col. Townsend Whelen
I agree about bullet sizes, I don't feel that your using the gun to its fullest extent, I don't shoot anything lighter then 180gr bullets. I know the spyder bull was killed with a 168gr barnes bullet. I reallly like the broughton barrels. Those carbon fiber barrels sure are nice, but not having a job is a little hard to swallow. But when I make up my mind after some more testing, If I decide to rebarrel then its going to be a 30" broughton and rechambered to 7MM STW, That gun will be extrememly acurate and recoild will not be quite as wild.