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
300 Raptor, first results....
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="Fiftydriver" data-source="post: 546530" data-attributes="member: 10"><p>B23,</p><p> </p><p>I have been thinking about a 7mm Raptor while designing the 300 and 338 Raptor receivers. I was kicking around the idea of building a 7mm Raptor at the same time but decided it would be wiser to see how the 300 Raptor turned out.</p><p> </p><p>After full testing of the 300 Raptor I will make a decision on the 7mm. The worry I have with a 7mm Raptor is simply bullets that would work with such a chambering. The 180 gr Berger has roughly a 3300 fps velocity ceiling, which the 7mm Allen Magnum can EASILY throttle past with no problems. If Berger would design a 180 gr VLD with a thicker jacket or even better yet a 190 gr VLD with a thick jacket, a 7mm Raptor reamer would have already been in the shop.</p><p> </p><p>The 175 gr SMK will take any velocity I can drive them to, which to date has been 3600 fps at the fastest trying to find the bullets velocity limits, I ran out of case before I could make the bullet fail out of the 7mm Allen Magnum. That said, its a sizable increase in capacity stepping up to what would be a 7mm Raptor. Only the ultra slow ball powders would be usible which perform great but you need to understand their limitations concerning temperature changes but if those are delt with these slow ball powders actually perform extremely well.</p><p> </p><p>The next issue comes with bullet weight. When you get a case capacity to a certainly size, you NEED a certain amount of resistance from the bullet to produce an effective ignition and efficent powder burn. IF you do not have enough bullet mass, you will start to see large velocity spreads. This is generally why the heaviest bullets you can use will often result in the best velocity uniformity.</p><p> </p><p>So why not just use the 200 gr Wildcat bullet. Same reason as the 180 gr Berger. It simply can not be driven much faster then 3300 fps. Again, the 7mm AM can achieve this velocity level.</p><p> </p><p>The 160 gr Accubnond will certainly take any velocity we could throw it at but we fall back onto the problem of powder ignition which may be a real issue with a wildcat with this low of an expansion ratio. </p><p> </p><p>After all that, I have and still am considering testing a 7mm Raptor.</p></blockquote><p></p>
[QUOTE="Fiftydriver, post: 546530, member: 10"] B23, I have been thinking about a 7mm Raptor while designing the 300 and 338 Raptor receivers. I was kicking around the idea of building a 7mm Raptor at the same time but decided it would be wiser to see how the 300 Raptor turned out. After full testing of the 300 Raptor I will make a decision on the 7mm. The worry I have with a 7mm Raptor is simply bullets that would work with such a chambering. The 180 gr Berger has roughly a 3300 fps velocity ceiling, which the 7mm Allen Magnum can EASILY throttle past with no problems. If Berger would design a 180 gr VLD with a thicker jacket or even better yet a 190 gr VLD with a thick jacket, a 7mm Raptor reamer would have already been in the shop. The 175 gr SMK will take any velocity I can drive them to, which to date has been 3600 fps at the fastest trying to find the bullets velocity limits, I ran out of case before I could make the bullet fail out of the 7mm Allen Magnum. That said, its a sizable increase in capacity stepping up to what would be a 7mm Raptor. Only the ultra slow ball powders would be usible which perform great but you need to understand their limitations concerning temperature changes but if those are delt with these slow ball powders actually perform extremely well. The next issue comes with bullet weight. When you get a case capacity to a certainly size, you NEED a certain amount of resistance from the bullet to produce an effective ignition and efficent powder burn. IF you do not have enough bullet mass, you will start to see large velocity spreads. This is generally why the heaviest bullets you can use will often result in the best velocity uniformity. So why not just use the 200 gr Wildcat bullet. Same reason as the 180 gr Berger. It simply can not be driven much faster then 3300 fps. Again, the 7mm AM can achieve this velocity level. The 160 gr Accubnond will certainly take any velocity we could throw it at but we fall back onto the problem of powder ignition which may be a real issue with a wildcat with this low of an expansion ratio. After all that, I have and still am considering testing a 7mm Raptor. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
300 Raptor, first results....
Top