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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Throat errosion concerning the large case 6.5's
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<blockquote data-quote="Steve Shelp" data-source="post: 27082" data-attributes="member: 22"><p><strong>Re: Throat errosion concerning the large case 6.5\'s</strong></p><p></p><p>Brent,</p><p> I've got both 6.5-300 Weatherby and a 6.5-300 Win Mag. The Weatherby (WWH) has had many rounds through it. I don't know how many because I didn't keep good records to be honest. But a couple simple calculations say it's over 1500rds easily. Right now the throat is so far gone from the original "140gr" throat in it that I can take a 155gr SMK and put it on the case mouth upside down, the chamber that round and pull it back out and the 155 will still be sitting loosly on top of the case. That throat is gone to say the least. BUT, I had this rifle out at our club last year or the year before firing on a Friday evening before a match jsut for fun and I never hit one of the clay pigions on the dirt bank at 1000yds but I threw dirt on many of them. I would say of the 15 or so rounds I fired that once I got it sighted in, all rounds would've killed a deer sized animal. But it's not shooting BR competition accuracy by any means.</p><p></p><p>My 6.5-300 Win Mag is throated for the 155s and has less than 400rds through it. The throat is still fresh and evenly worn. I bought this rifle off from my old shooting partner who retired from any serious shooting after eye surgery so I can't tell you how much the throat has burnt out in those 400+- rds because I don't know where it was brand new. But in any event it is not excessive.</p><p></p><p>Velocity: </p><p>WWH: I've been over 3500fps with 140s in a 30" barrel. BUT I'll admit, I was standing on them to see what it would do. As Darryl said you can get 3400+ and when I've shot the Weatherby in competition it was normally backed off to 3350 approx and barrel life was pretty good. My shooting partner I mentioned earlier, shot his 6.5-300 WWH for several years when he started competition shooting with decent success and not really unusual throat wear with the lower velocity.</p><p></p><p>6.5-300 Win Mag w/ 155gr bullets and 8" twist: If I remember correctly this would go up to 3250. The last time I chrono'd the accuracy load in that it was 3050. </p><p></p><p>So you might be on to something with going to the big case and backing down on the pressure/velocity to maintain a decent barrel life.</p><p></p><p>Case designs to reduce wear: I'm familiar with the long neck theory and several guys I shoot with are proponents of it. I simply don't know one way or the other. There are some working on the elliptical shoulder case to gain more effiecency but have seen any hard data to support that theory either... only opinions.</p><p></p><p>I could get the water volume of both of my cases for you. Gotta load my HG rounds tonight for the VA match this weekend. I can do it then.</p><p></p><p>Steve</p></blockquote><p></p>
[QUOTE="Steve Shelp, post: 27082, member: 22"] [b]Re: Throat errosion concerning the large case 6.5\'s[/b] Brent, I've got both 6.5-300 Weatherby and a 6.5-300 Win Mag. The Weatherby (WWH) has had many rounds through it. I don't know how many because I didn't keep good records to be honest. But a couple simple calculations say it's over 1500rds easily. Right now the throat is so far gone from the original "140gr" throat in it that I can take a 155gr SMK and put it on the case mouth upside down, the chamber that round and pull it back out and the 155 will still be sitting loosly on top of the case. That throat is gone to say the least. BUT, I had this rifle out at our club last year or the year before firing on a Friday evening before a match jsut for fun and I never hit one of the clay pigions on the dirt bank at 1000yds but I threw dirt on many of them. I would say of the 15 or so rounds I fired that once I got it sighted in, all rounds would've killed a deer sized animal. But it's not shooting BR competition accuracy by any means. My 6.5-300 Win Mag is throated for the 155s and has less than 400rds through it. The throat is still fresh and evenly worn. I bought this rifle off from my old shooting partner who retired from any serious shooting after eye surgery so I can't tell you how much the throat has burnt out in those 400+- rds because I don't know where it was brand new. But in any event it is not excessive. Velocity: WWH: I've been over 3500fps with 140s in a 30" barrel. BUT I'll admit, I was standing on them to see what it would do. As Darryl said you can get 3400+ and when I've shot the Weatherby in competition it was normally backed off to 3350 approx and barrel life was pretty good. My shooting partner I mentioned earlier, shot his 6.5-300 WWH for several years when he started competition shooting with decent success and not really unusual throat wear with the lower velocity. 6.5-300 Win Mag w/ 155gr bullets and 8" twist: If I remember correctly this would go up to 3250. The last time I chrono'd the accuracy load in that it was 3050. So you might be on to something with going to the big case and backing down on the pressure/velocity to maintain a decent barrel life. Case designs to reduce wear: I'm familiar with the long neck theory and several guys I shoot with are proponents of it. I simply don't know one way or the other. There are some working on the elliptical shoulder case to gain more effiecency but have seen any hard data to support that theory either... only opinions. I could get the water volume of both of my cases for you. Gotta load my HG rounds tonight for the VA match this weekend. I can do it then. Steve [/QUOTE]
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Throat errosion concerning the large case 6.5's
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