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APS 338 Raptor, R&D early results
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<blockquote data-quote="Fiftydriver" data-source="post: 844002" data-attributes="member: 10"><p>Was supposed to have some local customers come to the shop this morning but on the way to the shop I got a text that they were not going to be able to make it so I loaded up the gear and took a couple customer rifles and the 338 Raptor LRSS up to the range. It heated up fast so did not get to get a lot of work done on the Raptor but a good start. The most consistant loads were with RL50 loaded to an average velocity of 3182 fps. </p><p> </p><p>The loads loaded with US869 showed a bit more pressure on the range then I wanted. These were loaded to 3228 fps tested at the shop and on the range they were averaging 3253 fps which is just hotter then I like. I believe I can tone things down slightly and still make this powder work in cooler temps and still hold 3200 fps, in fact at 3200 fps, pressure are quite mild.</p><p> </p><p>Again, RL50 so far is taking the lead but also want to try some RL33 and see what happens. I think it will be to fast in burn rate but we will see.</p><p> </p><p>I shot today at 1790 yards. Only shot a few three shot groups of each powder but the rifle was easily holding well under 1 moa with all loads and the RL50 loads were ranging from just slightly over 3/4 moa to just under 3/4 moa. The mirage and air quality were pretty bad so I was happy with the start. All would have easily hammered a whitetail at that range cleanly through the vitals.</p><p> </p><p>Anyway, wanted to get some pics posted.</p><p> </p><p><img src="http://i8.photobucket.com/albums/a7/Fiftydriver/DSC00539_zps04648cf1.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p> </p><p>Pretty simple, Raptor LRSS rifle with adjustable A-5 tactical stock. Single shot platform. Leupold MK4 FFP 6.5-20x 50mm w/ TMR reticle.</p><p> </p><p><img src="http://i8.photobucket.com/albums/a7/Fiftydriver/DSC00538_zpsf152af96.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p> </p><p><img src="http://i8.photobucket.com/albums/a7/Fiftydriver/DSC00537_zps68561172.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p> </p><p><img src="http://i8.photobucket.com/albums/a7/Fiftydriver/DSC00541_zps6d4a3162.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p> </p><p>On the left is the 338 Raptor loaded with the 300 gr berger to 4.320" OAL. The round on the right is the 338 Allen Magnum loaded with same bullet to an OAL of 4.280", both rounds have the bullet seated to the base of the case neck. You can see on the Raptor case that the neck is very short, actually, its WAY shorter then production rifles will have. This is because of an oversight I had when I sent the reamer specs to the reamer maker. Raptor brass is 0.080" longer then the brass in the picture, have to trim it very short to fit the prototype chamber.</p><p> </p><p>Reamers are already being corrected as you read this but wanted to get bullets in the air and get testing done.</p><p> </p><p>Much more to come.</p></blockquote><p></p>
[QUOTE="Fiftydriver, post: 844002, member: 10"] Was supposed to have some local customers come to the shop this morning but on the way to the shop I got a text that they were not going to be able to make it so I loaded up the gear and took a couple customer rifles and the 338 Raptor LRSS up to the range. It heated up fast so did not get to get a lot of work done on the Raptor but a good start. The most consistant loads were with RL50 loaded to an average velocity of 3182 fps. The loads loaded with US869 showed a bit more pressure on the range then I wanted. These were loaded to 3228 fps tested at the shop and on the range they were averaging 3253 fps which is just hotter then I like. I believe I can tone things down slightly and still make this powder work in cooler temps and still hold 3200 fps, in fact at 3200 fps, pressure are quite mild. Again, RL50 so far is taking the lead but also want to try some RL33 and see what happens. I think it will be to fast in burn rate but we will see. I shot today at 1790 yards. Only shot a few three shot groups of each powder but the rifle was easily holding well under 1 moa with all loads and the RL50 loads were ranging from just slightly over 3/4 moa to just under 3/4 moa. The mirage and air quality were pretty bad so I was happy with the start. All would have easily hammered a whitetail at that range cleanly through the vitals. Anyway, wanted to get some pics posted. [IMG]http://i8.photobucket.com/albums/a7/Fiftydriver/DSC00539_zps04648cf1.jpg[/IMG] Pretty simple, Raptor LRSS rifle with adjustable A-5 tactical stock. Single shot platform. Leupold MK4 FFP 6.5-20x 50mm w/ TMR reticle. [IMG]http://i8.photobucket.com/albums/a7/Fiftydriver/DSC00538_zpsf152af96.jpg[/IMG] [IMG]http://i8.photobucket.com/albums/a7/Fiftydriver/DSC00537_zps68561172.jpg[/IMG] [IMG]http://i8.photobucket.com/albums/a7/Fiftydriver/DSC00541_zps6d4a3162.jpg[/IMG] On the left is the 338 Raptor loaded with the 300 gr berger to 4.320" OAL. The round on the right is the 338 Allen Magnum loaded with same bullet to an OAL of 4.280", both rounds have the bullet seated to the base of the case neck. You can see on the Raptor case that the neck is very short, actually, its WAY shorter then production rifles will have. This is because of an oversight I had when I sent the reamer specs to the reamer maker. Raptor brass is 0.080" longer then the brass in the picture, have to trim it very short to fit the prototype chamber. Reamers are already being corrected as you read this but wanted to get bullets in the air and get testing done. Much more to come. [/QUOTE]
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