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Hunting
Long Range Hunting & Shooting
.510 Allen Mag @ 1,000 y.
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<blockquote data-quote="Fiftydriver" data-source="post: 505410" data-attributes="member: 10"><p>Lil Tank,</p><p> </p><p>The 510 Allen Magnum is nothing more then the 50 BMG improved to my Allen Magnum shoulder and body taper design. You get roughly 15% increase in usible powder capacity over the 50 BMG but you also get a much better case design which dramatically limits case stretching which can be an issue with upper end loads in the standard 50 BMG.</p><p> </p><p>Standard 50 BMG loads will get you around 2600 to 2650 fps with the 750 gr A-Max. That said, many BR match shooters will load this bullet to the 2550 to 2600 fps range.</p><p> </p><p>The 510 AMs will start at around 2700 fps and go up from there. The fastest I have driven the 750 gr A-Max was 3050 fps out of a rebuilt AR-50 that the customer had me fit a 45", 1.750" straight cylinder Lilja to. That was a 60 lb rifle and recoil was extremly mild with my 5 port brake. That is an exception however and generally velocities max out in the 2950 fps range with a 30-32" barrel length with proper pressures for the 50 BMG parent case.</p><p> </p><p>I am currently working on a new 50 cal wildcat called the 510 Maximus. Still based on the 50 BMG case but I shorten the case neck down DRAMATICALLY but leave the overall case length the same. This increased the case body length by around 0.400". With a case the size of the 50 BMG, this will add another 15 to 20% powder capacity over even the 510 Allen Magnum!!! I also increased body taper slightly so that it can be loaded to slightly higher chamber pressures with good extraction properties. My goal is to see 3100 fps in a standard 30-32" barrel length!!! Time will tell. I have the reamers in stock and test barrel, just waiting for the loading dies to arrive for testing.</p></blockquote><p></p>
[QUOTE="Fiftydriver, post: 505410, member: 10"] Lil Tank, The 510 Allen Magnum is nothing more then the 50 BMG improved to my Allen Magnum shoulder and body taper design. You get roughly 15% increase in usible powder capacity over the 50 BMG but you also get a much better case design which dramatically limits case stretching which can be an issue with upper end loads in the standard 50 BMG. Standard 50 BMG loads will get you around 2600 to 2650 fps with the 750 gr A-Max. That said, many BR match shooters will load this bullet to the 2550 to 2600 fps range. The 510 AMs will start at around 2700 fps and go up from there. The fastest I have driven the 750 gr A-Max was 3050 fps out of a rebuilt AR-50 that the customer had me fit a 45", 1.750" straight cylinder Lilja to. That was a 60 lb rifle and recoil was extremly mild with my 5 port brake. That is an exception however and generally velocities max out in the 2950 fps range with a 30-32" barrel length with proper pressures for the 50 BMG parent case. I am currently working on a new 50 cal wildcat called the 510 Maximus. Still based on the 50 BMG case but I shorten the case neck down DRAMATICALLY but leave the overall case length the same. This increased the case body length by around 0.400". With a case the size of the 50 BMG, this will add another 15 to 20% powder capacity over even the 510 Allen Magnum!!! I also increased body taper slightly so that it can be loaded to slightly higher chamber pressures with good extraction properties. My goal is to see 3100 fps in a standard 30-32" barrel length!!! Time will tell. I have the reamers in stock and test barrel, just waiting for the loading dies to arrive for testing. [/QUOTE]
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.510 Allen Mag @ 1,000 y.
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