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
Rifles, Reloading, Optics, Equipment
Reloading
most accurate 30/338 brass
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="Bart B" data-source="post: 641469" data-attributes="member: 5302"><p>With the same bore dimensions and peak pressures, a .30-.338 shoots the same bullet out slower than a .300 Win. Mag; it burns less powder.</p><p></p><p>I've wore out 3.5 .30-.338 barrels using Winchester .338 Win. Mag. brass for the standard version and Winchester .300 Win. Mag. brass for the long neck (Keele) version. Both versions produce 1/2 MOA accuracy for 30 shots at 1000 yards. New cases shoot just as accurate as properly full length sized ones. Sort cases into 1% spreads in case weight and that's all that's needed with standard chamber neck diameters about .342 inch. Tight chamber necks don't consistantly shoot as accurate as standard ones.</p><p></p><p>When I chronographed my 28-inch barrels, Sierra 190's left a bit over 3000 fps with 65 to 66 grains of IMR4350 and their 200's left a bit under 3000 fps with one grain less powder.</p><p></p><p>The best thing about fluting a barrel is it makes extra money for the guy fluting it. Fluting a finished button-rifled barrel changes its bore dimensions a tiny amount and accuracy suffers. Cut rifled finished barrels suffer the least from being fluted. Fluting does nothing for accuracy. And fluting a finished barrel makes it less stiff, but barrel stiffness has little to do with accuracy anyway. Fluted barrels cool a bit faster than solid ones, but a good barrel (fluted or not) properly fit to a receiver doesn't change point of impact as it heats up. If one must have a fluted barrel, make sure it's fluted before it's rifled and lapped to specs.</p></blockquote><p></p>
[QUOTE="Bart B, post: 641469, member: 5302"] With the same bore dimensions and peak pressures, a .30-.338 shoots the same bullet out slower than a .300 Win. Mag; it burns less powder. I've wore out 3.5 .30-.338 barrels using Winchester .338 Win. Mag. brass for the standard version and Winchester .300 Win. Mag. brass for the long neck (Keele) version. Both versions produce 1/2 MOA accuracy for 30 shots at 1000 yards. New cases shoot just as accurate as properly full length sized ones. Sort cases into 1% spreads in case weight and that's all that's needed with standard chamber neck diameters about .342 inch. Tight chamber necks don't consistantly shoot as accurate as standard ones. When I chronographed my 28-inch barrels, Sierra 190's left a bit over 3000 fps with 65 to 66 grains of IMR4350 and their 200's left a bit under 3000 fps with one grain less powder. The best thing about fluting a barrel is it makes extra money for the guy fluting it. Fluting a finished button-rifled barrel changes its bore dimensions a tiny amount and accuracy suffers. Cut rifled finished barrels suffer the least from being fluted. Fluting does nothing for accuracy. And fluting a finished barrel makes it less stiff, but barrel stiffness has little to do with accuracy anyway. Fluted barrels cool a bit faster than solid ones, but a good barrel (fluted or not) properly fit to a receiver doesn't change point of impact as it heats up. If one must have a fluted barrel, make sure it's fluted before it's rifled and lapped to specs. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
most accurate 30/338 brass
Top