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#968662 - 11/10/15 10:19 PM .264 reloading issue
Zane Powell Pea shooter Registered: 02/14/11 Posts: 8 Loc: Virginia City or County: Richmond	Helping a friend reload .264 Winchester magnum. Issue we are having is when round goes into chamber projectile is pushed deeper into case thus making round 1/8" shorter. Bolt will not lock in. After measuring everything we came up with projectile being to large in diameter. Factory round projectile is.257" in diameter. Found new projectiles (Sierra 6.5mm 140 grain) suggested by Lyman reloading manual to be .263" in diameter, barrel measures .263" also. Could this be an age issue(gun is 30 plus years old) and has anyone come across this issue with any caliber? Any help would be appreciated. Regards, Zane Powell
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#968694 - 11/10/15 11:41 PM Re: .264 reloading issue [Re: Zane Powell]
LaserJock B * L * U * E Registered: 11/21/08 Posts: 6248 Loc: NoVA 22192 City or County: NoVA 22192	Originally Posted By: Zane Powell Helping a friend reload .264 Winchester magnum. Issue we are having is when round goes into chamber projectile is pushed deeper into case thus making round 1/8" shorter. Bolt will not lock in. After measuring everything we came up with projectile being to large in diameter. Factory round projectile is.257" in diameter. Found new projectiles (Sierra 6.5mm 140 grain) suggested by Lyman reloading manual to be .263" in diameter, barrel measures .263" also. Could this be an age issue(gun is 30 plus years old) and has anyone come across this issue with any caliber? Any help would be appreciated. Regards, Zane Powell No offense meant but what caliber is marked on the rifle? Compare a fired unsized case to factory ammo. Inspect brass for non uniformity. Measure and compare the neck and shoulder areas. Inspect chamber with a good light. May have obstruction. Section of the neck or jacket broke off. A more complicated task is a chamber cast. .257 is not .264
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#969490 - 11/13/15 08:26 AM Re: .264 reloading issue [Re: Zane Powell]
scythefwd Pea Shooter Registered: 02/19/11 Posts: 2430 Loc: KS City or County: Lenexa	Quote: Issue we are having is when round goes into chamber projectile is pushed deeper into case thus making round 1/8" shorter That is a huge change. Will the bolt close and lock in on a newly sized piece of brass? If so, it could be the profile of the bullet. The ogive on the bullet may be seating itself into the lands and pushing itself back as you close the bolt. 1/8" is a LOT though.. ./257 on a factory projectile? I'm with LJ, 257 is too small to shoot in a .263 bore, your accuracy should be horrible and you'd have all sorts of blow back as your brass wouldn't properly seal.
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