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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
338 Raptor Magnum Teaser from APS
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<blockquote data-quote="Fiftydriver" data-source="post: 692386" data-attributes="member: 10"><p>I will get some pics of the rifle today. Heading up to the range with a customer to get his new 300 AX drops tested and have a couple customer rifles to test as well plus test the drops on the 300 gr Berger Hybrid.</p><p> </p><p>Just some prelim numbers on the drop chart. I zero most of my rifles at 300 yards, at least those rifles that will be used for 1000 yards and under and as most of you know I use the reticle for hold over out to 1000 yards for big game hunting. For my rifles set up for dedicated extreme range shooting I will zero at 100 and dial up for each shot.</p><p> </p><p>I am setting this rifle up for hold over for this season of use just because I will probably limit my range to around 1K with the limited time I have on the rifle before big game season this year. Anyway, here are some drop numbers with a 300 yard zero in a 10 mph cross wind. Drop and drift in MOA.</p><p> </p><p>Yards.........Drop...........Drift............Velocity.............Ft/lbs..........TOF</p><p>100............+2.5...........0.3..............3068................6271...........0.09sec</p><p>200............+1.6...........0.5..............2969................5871...........0.19</p><p>300............0.0.............0.8..............2872................5492...........0.29</p><p>400............-1.8............1.1..............2776................5134...........0.40</p><p>500............-3.7............1.4..............2683................4795...........0.51</p><p>600............-5.8............1.7..............2592................4475...........0.62</p><p>700............-8.0............2.0..............2503................4173...........0.74</p><p>800............-10.2..........2.3..............2415................3886...........0.86</p><p>900............-12.7..........2.7..............2330................3615...........0.99</p><p>1000..........-15.2..........3.0..............2246................3359...........1.12</p><p> </p><p>These numbers are made using a BC of .850 with the Berger Hybrid. I will probably switch to the G7 BC but for now just using the G1 to get close. Berger lists this bullet with a BC of .819 I believe. In using this bullet in my 338 Allen Xpress(3000 fps) and 338 Allen Magnum(3350 fps) I have found that I had to use a BC of .880 and .860 respectively for these two chamberings to get predicted trajectory to match up with actual trajectory. I suspect I will be increasing the BC of the 338 Raptor drops as well as it lands right between these two but will start at .850 for now and tweak on the range today.</p><p> </p><p>Being VERY used to the performance numbers of the 338 Allen Magnum, you get pretty spoiled with ballistic performance so to me, at first glance, these numbers seem GOOD but nothing Amazing. But when I sit back and realize this is a wildcat chambering thats housed in a Conventional(if you can call teh Raptor receiver conventional) 1.350" diameter receiver with conventional barrel contours and conventional stocks and conventional rifle weights, it is most impressive for sure.</p><p> </p><p>She is putting down numbers at 300 yards that fully match the 338 Edge and 338 Lapua at the muzzle!!! </p><p> </p><p>Load specs being tested today are:</p><p> </p><p>300 gr berger hybrid</p><p>124.0 gr RL50</p><p>Fed-215 primer</p><p>Bertram 338 Raptor production brass</p><p>4.210" OAL</p><p>3170 fps average with 14 ES for 5 round string</p><p> </p><p>Again, this is with a relatively short 0.090" throat length. AS mentioned earlier, I have a new reamer submitted that will be a MUCH better match for this brass and as the 338 Raptor is really to long for any repeating DM system we have available today, I will have that reamer cut with a 0.200-0.250" throat length. This alone will add 8-10 grains powder capacity to the 338 Raptors boiler room and hopefully will bring H-50BMG back into play allowing us to reach top working pressures with sub 100% load densities.</p><p> </p><p>Last night I tested RL50 and was VERY impressed with its velocity results. Its significantly denser by volume then H-50BMG while being similiar in kernal size. It also produced 25-30 fps more velocity for any given powder charge showing that it is slightly faster in burn rate. Higher density with slightly faster burn rate, almost ideal for this chambering and the 300 gr bullet weights.</p><p> </p><p>With H50BMG, the 338 Raptor topped out at 125.0 gr and 3178 fps with around a 103-105% load density. RL50 on the other hand, with 124.0 grains averaged 3170 fps with a load density of around 98-99% with no powder crunching at all when seating bullets which I much prefer. I was also able to go up to 126.0 grains of RL50 which produced 3244 fps but pressures were a bit higher then I wanted to see so I dropped the load back a couple grains. If I were using this rifle here for big game hunting I would go with 125.0 gr which was right at 3200 fps. I am heading to Nebraska in the black hills area for an early season private ground elk hunt this weekend and it may be much warmer then here at home so I decided it would be best to give up a few FPS for more cushion if the temps are hotter. Its nice to have the horsepower to take a reduced load and still get 3170 fps!!! </p><p> </p><p>That has always been one of the great features of the Allen Magnums and Allen Xpress wildcats, you do not have to run them to red line pressures to get amazing ballistic performance. Just as with high performance automotive engines, its easier to make big power with larger displacement engines. Its also easier on the engine to make that higher power then with a smaller displacement engine. </p><p> </p><p>Will get some pics of rifle and some long range reports on the 300 gr Berger. Hopefully this weekend I will be able to get some long range field testing results to report on with a good bull on the ground.</p></blockquote><p></p>
[QUOTE="Fiftydriver, post: 692386, member: 10"] I will get some pics of the rifle today. Heading up to the range with a customer to get his new 300 AX drops tested and have a couple customer rifles to test as well plus test the drops on the 300 gr Berger Hybrid. Just some prelim numbers on the drop chart. I zero most of my rifles at 300 yards, at least those rifles that will be used for 1000 yards and under and as most of you know I use the reticle for hold over out to 1000 yards for big game hunting. For my rifles set up for dedicated extreme range shooting I will zero at 100 and dial up for each shot. I am setting this rifle up for hold over for this season of use just because I will probably limit my range to around 1K with the limited time I have on the rifle before big game season this year. Anyway, here are some drop numbers with a 300 yard zero in a 10 mph cross wind. Drop and drift in MOA. Yards.........Drop...........Drift............Velocity.............Ft/lbs..........TOF 100............+2.5...........0.3..............3068................6271...........0.09sec 200............+1.6...........0.5..............2969................5871...........0.19 300............0.0.............0.8..............2872................5492...........0.29 400............-1.8............1.1..............2776................5134...........0.40 500............-3.7............1.4..............2683................4795...........0.51 600............-5.8............1.7..............2592................4475...........0.62 700............-8.0............2.0..............2503................4173...........0.74 800............-10.2..........2.3..............2415................3886...........0.86 900............-12.7..........2.7..............2330................3615...........0.99 1000..........-15.2..........3.0..............2246................3359...........1.12 These numbers are made using a BC of .850 with the Berger Hybrid. I will probably switch to the G7 BC but for now just using the G1 to get close. Berger lists this bullet with a BC of .819 I believe. In using this bullet in my 338 Allen Xpress(3000 fps) and 338 Allen Magnum(3350 fps) I have found that I had to use a BC of .880 and .860 respectively for these two chamberings to get predicted trajectory to match up with actual trajectory. I suspect I will be increasing the BC of the 338 Raptor drops as well as it lands right between these two but will start at .850 for now and tweak on the range today. Being VERY used to the performance numbers of the 338 Allen Magnum, you get pretty spoiled with ballistic performance so to me, at first glance, these numbers seem GOOD but nothing Amazing. But when I sit back and realize this is a wildcat chambering thats housed in a Conventional(if you can call teh Raptor receiver conventional) 1.350" diameter receiver with conventional barrel contours and conventional stocks and conventional rifle weights, it is most impressive for sure. She is putting down numbers at 300 yards that fully match the 338 Edge and 338 Lapua at the muzzle!!! Load specs being tested today are: 300 gr berger hybrid 124.0 gr RL50 Fed-215 primer Bertram 338 Raptor production brass 4.210" OAL 3170 fps average with 14 ES for 5 round string Again, this is with a relatively short 0.090" throat length. AS mentioned earlier, I have a new reamer submitted that will be a MUCH better match for this brass and as the 338 Raptor is really to long for any repeating DM system we have available today, I will have that reamer cut with a 0.200-0.250" throat length. This alone will add 8-10 grains powder capacity to the 338 Raptors boiler room and hopefully will bring H-50BMG back into play allowing us to reach top working pressures with sub 100% load densities. Last night I tested RL50 and was VERY impressed with its velocity results. Its significantly denser by volume then H-50BMG while being similiar in kernal size. It also produced 25-30 fps more velocity for any given powder charge showing that it is slightly faster in burn rate. Higher density with slightly faster burn rate, almost ideal for this chambering and the 300 gr bullet weights. With H50BMG, the 338 Raptor topped out at 125.0 gr and 3178 fps with around a 103-105% load density. RL50 on the other hand, with 124.0 grains averaged 3170 fps with a load density of around 98-99% with no powder crunching at all when seating bullets which I much prefer. I was also able to go up to 126.0 grains of RL50 which produced 3244 fps but pressures were a bit higher then I wanted to see so I dropped the load back a couple grains. If I were using this rifle here for big game hunting I would go with 125.0 gr which was right at 3200 fps. I am heading to Nebraska in the black hills area for an early season private ground elk hunt this weekend and it may be much warmer then here at home so I decided it would be best to give up a few FPS for more cushion if the temps are hotter. Its nice to have the horsepower to take a reduced load and still get 3170 fps!!! That has always been one of the great features of the Allen Magnums and Allen Xpress wildcats, you do not have to run them to red line pressures to get amazing ballistic performance. Just as with high performance automotive engines, its easier to make big power with larger displacement engines. Its also easier on the engine to make that higher power then with a smaller displacement engine. Will get some pics of rifle and some long range reports on the 300 gr Berger. Hopefully this weekend I will be able to get some long range field testing results to report on with a good bull on the ground. [/QUOTE]
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338 Raptor Magnum Teaser from APS
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