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
Equipment Discussions
Ultimate economy long range deer/antelope gun
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: 46103" data-attributes="member: 10"><p>STL,</p><p></p><p>Please keep in mind my performance goals for my AM rounds are nothing remotely similiar to a Comp rifle or Varmint rifle where throat life is a premium.</p><p></p><p>These are Big Game rifles. They are designed to be used in a way that an experienced handloader can find a top quality load in far less then 100 yards and use the rifle big game hunting where taking a few shots at game a year should be an exciting season.</p><p></p><p>The 257 STW rifles I have built have been lasting for 1000-1200 rounds of accurate barrel life before they are either ready to be set back or replaced with a fresh barrel.</p><p></p><p>TO answer your question on powders that will be used, for the lighter to medium weight bullets in the 257 and 6.5 AM and all the bullets in the 270 AM, Retumbo will be the powder of choice. It is as temp stable as any powder out there and should be a great ballance of burn rate to bore capacity for the lighter weight 257 and 6.5 AM bullets as well as all the 270 AM loads.</p><p></p><p>For the heavies in 257 and 6.5mm, H-50BMG will be getting the go ahead. Again this powder is very stable over a wide range of temps.</p><p></p><p>The 257 AM and 6.5mm AM have roughly the same case capacity to bore volume ratio as the 30-378. Anyone see a real problem with that round in powder selection?</p><p></p><p>I assure you my loads will produce brass life in the 5 to 6 firings range. Again, these are big game rifles, this is more then enough case life for that use, hell a 100 brass should last a lifetime of big game hunting.</p><p></p><p>The 6.5mm WSM is not even remotely in the same class as the AM rounds. The AM's are more round then has been used in these calibers. Combining that with the heavy for caliber bullets from Wildcat Bullets, this is the reason these rounds will work where other big cased rounds on small bores have not. </p><p></p><p>They tried to force light bullets to hyper velocities for long range performance. The only way to get consistant long range performance is with high velocity but just as important high B.C. and for on game performance, high S.D.</p><p></p><p>The AM rounds will have a powder capacity roughly 30 gr larger then the WSM rounds. The only way this large of a case capacity will work is to use non conventional bullet weights which we are doing. </p><p></p><p>In the 257 AM, I would say 130 gr bullets are as light as I will go in my testing. One could use 115 to 120 gr pill with good results but the 130 is a good minimum in my mind.</p><p></p><p>The 257 STW gets pretty finicky with 100 gr bullets and the 257 AM would be the same way with 115 gr pills. Velocity will basically be the same with the 100 gr bullet in the STW and the 115 in the AM.</p><p></p><p>All the things you have mentioned are real problems and Richard Graves and I have taken alot of time and research to come up with what we are releasing.</p><p></p><p>Will they perform exactly how I am telling it now, I hope so and believe they will. No matter what though, if my rounds will not reach my performance goals within safe pressures, I will never use damgerous pressures just to reach a velocity for a selling point.</p><p></p><p>There is no need with the level of performance these rounds will offer, even if they miss my goals by a small margin, they will still be vastly superior to any 257 , 6.5 and 277 round offered now for hunting deer and pronghorn out to 600 yards out of a sporter weight rifle.</p><p></p><p>I also had alot of guys tell me that the #6 contoured barrels would not offer enough accuracy in the 257 STW class rounds for shooting out to 500 yards. Well, after they were built and tested and proven to produce groups in the 1 1/4" range at 500 yards, those non believers came around a bit even though some needed to see it in person to believe it.</p><p></p><p>Good Shooting!!</p><p></p><p>Kirby Allen(50)</p></blockquote><p></p>
[QUOTE="Fiftydriver, post: 46103, member: 10"] STL, Please keep in mind my performance goals for my AM rounds are nothing remotely similiar to a Comp rifle or Varmint rifle where throat life is a premium. These are Big Game rifles. They are designed to be used in a way that an experienced handloader can find a top quality load in far less then 100 yards and use the rifle big game hunting where taking a few shots at game a year should be an exciting season. The 257 STW rifles I have built have been lasting for 1000-1200 rounds of accurate barrel life before they are either ready to be set back or replaced with a fresh barrel. TO answer your question on powders that will be used, for the lighter to medium weight bullets in the 257 and 6.5 AM and all the bullets in the 270 AM, Retumbo will be the powder of choice. It is as temp stable as any powder out there and should be a great ballance of burn rate to bore capacity for the lighter weight 257 and 6.5 AM bullets as well as all the 270 AM loads. For the heavies in 257 and 6.5mm, H-50BMG will be getting the go ahead. Again this powder is very stable over a wide range of temps. The 257 AM and 6.5mm AM have roughly the same case capacity to bore volume ratio as the 30-378. Anyone see a real problem with that round in powder selection? I assure you my loads will produce brass life in the 5 to 6 firings range. Again, these are big game rifles, this is more then enough case life for that use, hell a 100 brass should last a lifetime of big game hunting. The 6.5mm WSM is not even remotely in the same class as the AM rounds. The AM's are more round then has been used in these calibers. Combining that with the heavy for caliber bullets from Wildcat Bullets, this is the reason these rounds will work where other big cased rounds on small bores have not. They tried to force light bullets to hyper velocities for long range performance. The only way to get consistant long range performance is with high velocity but just as important high B.C. and for on game performance, high S.D. The AM rounds will have a powder capacity roughly 30 gr larger then the WSM rounds. The only way this large of a case capacity will work is to use non conventional bullet weights which we are doing. In the 257 AM, I would say 130 gr bullets are as light as I will go in my testing. One could use 115 to 120 gr pill with good results but the 130 is a good minimum in my mind. The 257 STW gets pretty finicky with 100 gr bullets and the 257 AM would be the same way with 115 gr pills. Velocity will basically be the same with the 100 gr bullet in the STW and the 115 in the AM. All the things you have mentioned are real problems and Richard Graves and I have taken alot of time and research to come up with what we are releasing. Will they perform exactly how I am telling it now, I hope so and believe they will. No matter what though, if my rounds will not reach my performance goals within safe pressures, I will never use damgerous pressures just to reach a velocity for a selling point. There is no need with the level of performance these rounds will offer, even if they miss my goals by a small margin, they will still be vastly superior to any 257 , 6.5 and 277 round offered now for hunting deer and pronghorn out to 600 yards out of a sporter weight rifle. I also had alot of guys tell me that the #6 contoured barrels would not offer enough accuracy in the 257 STW class rounds for shooting out to 500 yards. Well, after they were built and tested and proven to produce groups in the 1 1/4" range at 500 yards, those non believers came around a bit even though some needed to see it in person to believe it. Good Shooting!! Kirby Allen(50) [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Equipment Discussions
Ultimate economy long range deer/antelope gun
Top