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
Rifles, Bullets, Barrels & Ballistics
New .338 lanches a 300gr Sierra MK at 3500fps?
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="Brent" data-source="post: 21907" data-attributes="member: 99"><p>Steve, I was comparing a case of my brothers in 338/378 which was 126gr water and a case of Darryls 338/416 Imp that was 134gr water. Derricks has a tight neck chamber and was not sized, Darryls was sized already so what it was when fire formed I don't know. Both had primers inserted upside down and a drop of soap to break the surface tension of the water (keeps it from rising above the case mouth). Both case were weighed before and after on a powder pro RCBS digital. I only weighed one case each and Darryls was definatly larger even though they looked very similar besides the shoulders. With what you say Steve I will check a few more of the 338/378's to see if it's a low one. </p><p></p><p>Steve, any idea of case capacity in the improved 338/378 Weatherby? I'm guessing 140gr or so unless they neck down 460 brass to keep the necks long and then would they increase the case OAL even more also?</p><p></p><p>Dave went hunting to Argentina yesterday, so I can't ask him about the taper issue for two weeks now. Darryl, will you measure a fired case of yours and see if there is a little less taper in those cases to make me feel a little better for now, maybe your sizer is a bit tighter than the reamer was.</p><p></p><p>Ok I must say I am tossing around the idea of using the 338/378 case as is for a few reasons, the one Derrick has with the tight neck really shoots awesome. He has dies mounted in a Dillon 550 head that I can bring over and mount and use in mine for now. We can shoot the same ammo in a pinch if needed. His load development MAY help mine $$$$. </p><p></p><p>I haven't had problems with brass on my 416wby yet, my 378wby showed a few hairline cracks above the belt on a few cases but I don't know how old those cases were, they came with the gun and were pretty used. I have come to learn by measuring belts on these cases where a load is getting stiff and killing case life, Cases aren't cheap.</p></blockquote><p></p>
[QUOTE="Brent, post: 21907, member: 99"] Steve, I was comparing a case of my brothers in 338/378 which was 126gr water and a case of Darryls 338/416 Imp that was 134gr water. Derricks has a tight neck chamber and was not sized, Darryls was sized already so what it was when fire formed I don't know. Both had primers inserted upside down and a drop of soap to break the surface tension of the water (keeps it from rising above the case mouth). Both case were weighed before and after on a powder pro RCBS digital. I only weighed one case each and Darryls was definatly larger even though they looked very similar besides the shoulders. With what you say Steve I will check a few more of the 338/378's to see if it's a low one. Steve, any idea of case capacity in the improved 338/378 Weatherby? I'm guessing 140gr or so unless they neck down 460 brass to keep the necks long and then would they increase the case OAL even more also? Dave went hunting to Argentina yesterday, so I can't ask him about the taper issue for two weeks now. Darryl, will you measure a fired case of yours and see if there is a little less taper in those cases to make me feel a little better for now, maybe your sizer is a bit tighter than the reamer was. Ok I must say I am tossing around the idea of using the 338/378 case as is for a few reasons, the one Derrick has with the tight neck really shoots awesome. He has dies mounted in a Dillon 550 head that I can bring over and mount and use in mine for now. We can shoot the same ammo in a pinch if needed. His load development MAY help mine $$$$. I haven't had problems with brass on my 416wby yet, my 378wby showed a few hairline cracks above the belt on a few cases but I don't know how old those cases were, they came with the gun and were pretty used. I have come to learn by measuring belts on these cases where a load is getting stiff and killing case life, Cases aren't cheap. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
New .338 lanches a 300gr Sierra MK at 3500fps?
Top