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<blockquote data-quote="510whisper" data-source="post: 289957" data-attributes="member: 18372"><p>Gidday Joel,</p><p> the 510 whisper was developed by the master of the whisper rounds Mr.J.D.Jones and this one is his best I believe...It's a proprietary cartridge that has a parent case from the 338 lapua and shortened to suit subsonic use.Ideally it runs the 750grn amax at 1050fps in a tight twist barrel that only needs to be 15" to perform...I run a 18"barrel to get some better supersonic qualities aswell.When I say longrange I mean a longerange subsonic rifle and it will group sub minute at 600 yrds with ease...It's like lobing a brick but it does lob it very well..for killing power ...well the subsonics are a whole new ball game when it comes to that...In general they cut just like a broadhead on an arrow does and the animal bleeds out mostly from the exit wounds which is huge due to the yawing effect from such large pills these whispers run.The 510 although it exits does produce a fair bit of knockdown power as it passes through..imagine if you will a 2.7inch pill yawing after impact whistling through an animals chest cavity.The 510 whisper suits longrange shots as does the others in JD's arsinal as time must be taken from the hunter to exact range and elevation to place the best killing shot possible. I have also used Lehigh bullets with excellent results from Dave and his budget ball pill (647grns) certainly shoots like a demon out of my rock chucker and is my only choice for supersonic loads..I have not produced claimed speeds with my 510 as printed as I stopped when the bullet stood still and the gun backed away from it...lol...maybe I'm just a wimp lightbulb...So all and all the 510whisper is my choice of a subsonic longrange rifle...Reece.</p></blockquote><p></p>
[QUOTE="510whisper, post: 289957, member: 18372"] Gidday Joel, the 510 whisper was developed by the master of the whisper rounds Mr.J.D.Jones and this one is his best I believe...It's a proprietary cartridge that has a parent case from the 338 lapua and shortened to suit subsonic use.Ideally it runs the 750grn amax at 1050fps in a tight twist barrel that only needs to be 15" to perform...I run a 18"barrel to get some better supersonic qualities aswell.When I say longrange I mean a longerange subsonic rifle and it will group sub minute at 600 yrds with ease...It's like lobing a brick but it does lob it very well..for killing power ...well the subsonics are a whole new ball game when it comes to that...In general they cut just like a broadhead on an arrow does and the animal bleeds out mostly from the exit wounds which is huge due to the yawing effect from such large pills these whispers run.The 510 although it exits does produce a fair bit of knockdown power as it passes through..imagine if you will a 2.7inch pill yawing after impact whistling through an animals chest cavity.The 510 whisper suits longrange shots as does the others in JD's arsinal as time must be taken from the hunter to exact range and elevation to place the best killing shot possible. I have also used Lehigh bullets with excellent results from Dave and his budget ball pill (647grns) certainly shoots like a demon out of my rock chucker and is my only choice for supersonic loads..I have not produced claimed speeds with my 510 as printed as I stopped when the bullet stood still and the gun backed away from it...lol...maybe I'm just a wimp lightbulb...So all and all the 510whisper is my choice of a subsonic longrange rifle...Reece. [/QUOTE]
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