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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Chinchaga 338 Cal 300 gr in 338 Edge with RL33
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<blockquote data-quote="Swamplord" data-source="post: 1202283" data-attributes="member: 2460"><p>300 gr Chinchaga RBT ST Hybrid bullets, Alliant's Reloder 33 powder, Federal GM215M primers all crammed into new unfired Norma made 300 RUM brass necked up to 338 cal. via a "PMA TOOl" .338" neck expander then neck sized in a Redding 338 Edge FL die (without disturbing the shoulder and body) about 7/8 down the neck giving a neck ID of .335" for .003" bullet tension, case length after all sizing done is 2.825"... </p><p>unturned neck walls are .015" thick per side and loaded round neck OD is .368" allowing for .002" per side neck clearance in a .372" neck/chamber diameter..........</p><p></p><p>Rem 700, 30" 9.5 tw 5R Obermeyer barrel </p><p>300 gr Chinchaga RBT ST Hybrid bullets WS2 coated</p><p>COAL 3.845" CBTO 3.005" .020" jump to rifling </p><p>Reloder 33 powder in all loads........</p><p></p><p>I started load developement at a low starting point as usual, to create a known velocity table for powder/bullet combo and to watch velocity build in .5 gr increments....... all loads fired over a Magnetospeed chronograph....... 87.0 gr thru 94.5 gr were single shots to find velocity then, 95.0 gr thru 99.5 gr are 4 shot averages, I loaded for a 3 shot group each + 1 extra for water jug test in the event I reached pressure and had to stop I had an extra round per load charge for water jug test, I ended up shooting all without reaching any signs of pressure and the 99.5 gr extra round was used on water jugs at 50 yards with velocity at 2836 fps, bullet destroyed 4 water jugs and was recovered in the 5th water jug.... expanded slug weighs 165 gr for 55% weight retention......</p><p> mushroom measurements are 1.134" wide by .720" wide and .725" height...... </p><p>phenomenal expansion and penetration !</p><p></p><p>Since I didn't hit pressures with the 99.5 gr loads, next I am loading up to 103,0 gr and will post final data at a later date after the shooting's done, </p><p></p><p>single shot velocity</p><p>87.0 gr 2453 fps</p><p>87.5 gr 2458</p><p>88.0 gr 2463</p><p>88.5 gr 2472</p><p>89.0 gr 2480</p><p>89.5 gr 2493</p><p>90.0 gr 2495</p><p>90.5 gr 2500</p><p>91.0 gr 2525</p><p>91.5 gr 2535</p><p>92.0 gr 2562</p><p>92.5 gr 2569</p><p>93.0 gr 2586</p><p>93.5 gr 2606</p><p>94.0 gr 2634</p><p>94.5 gr 2660</p><p></p><p>4 shot average velocity</p><p>95.0 gr 2673 fps</p><p>95.5 gr 2682</p><p>96.0 gr 2705</p><p>96.5 gr 2726</p><p>97.0 gr 2750</p><p>97.5 gr 2762 </p><p>98.0 gr 2780 </p><p>98.5 gr 2791 (3rd target 100 yard 3 shot group & 50 yard rock)</p><p>99.0 gr 2801 (2nd target 100 yard 3 shot group & 50 yard rock)</p><p>99.5 gr 2832 (1st target 100 yard 3 shot group in video)</p><p>99.5 gr 2836 fps (water jugs)</p><p></p><p><a href="https://www.youtube.com/watch?v=opWQ64AfmEs" target="_blank">https://www.youtube.com/watch?v=opWQ64AfmEs</a></p></blockquote><p></p>
[QUOTE="Swamplord, post: 1202283, member: 2460"] 300 gr Chinchaga RBT ST Hybrid bullets, Alliant's Reloder 33 powder, Federal GM215M primers all crammed into new unfired Norma made 300 RUM brass necked up to 338 cal. via a "PMA TOOl" .338" neck expander then neck sized in a Redding 338 Edge FL die (without disturbing the shoulder and body) about 7/8 down the neck giving a neck ID of .335" for .003" bullet tension, case length after all sizing done is 2.825"... unturned neck walls are .015" thick per side and loaded round neck OD is .368" allowing for .002" per side neck clearance in a .372" neck/chamber diameter.......... Rem 700, 30" 9.5 tw 5R Obermeyer barrel 300 gr Chinchaga RBT ST Hybrid bullets WS2 coated COAL 3.845" CBTO 3.005" .020" jump to rifling Reloder 33 powder in all loads........ I started load developement at a low starting point as usual, to create a known velocity table for powder/bullet combo and to watch velocity build in .5 gr increments....... all loads fired over a Magnetospeed chronograph....... 87.0 gr thru 94.5 gr were single shots to find velocity then, 95.0 gr thru 99.5 gr are 4 shot averages, I loaded for a 3 shot group each + 1 extra for water jug test in the event I reached pressure and had to stop I had an extra round per load charge for water jug test, I ended up shooting all without reaching any signs of pressure and the 99.5 gr extra round was used on water jugs at 50 yards with velocity at 2836 fps, bullet destroyed 4 water jugs and was recovered in the 5th water jug.... expanded slug weighs 165 gr for 55% weight retention...... mushroom measurements are 1.134" wide by .720" wide and .725" height...... phenomenal expansion and penetration ! Since I didn't hit pressures with the 99.5 gr loads, next I am loading up to 103,0 gr and will post final data at a later date after the shooting's done, single shot velocity 87.0 gr 2453 fps 87.5 gr 2458 88.0 gr 2463 88.5 gr 2472 89.0 gr 2480 89.5 gr 2493 90.0 gr 2495 90.5 gr 2500 91.0 gr 2525 91.5 gr 2535 92.0 gr 2562 92.5 gr 2569 93.0 gr 2586 93.5 gr 2606 94.0 gr 2634 94.5 gr 2660 4 shot average velocity 95.0 gr 2673 fps 95.5 gr 2682 96.0 gr 2705 96.5 gr 2726 97.0 gr 2750 97.5 gr 2762 98.0 gr 2780 98.5 gr 2791 (3rd target 100 yard 3 shot group & 50 yard rock) 99.0 gr 2801 (2nd target 100 yard 3 shot group & 50 yard rock) 99.5 gr 2832 (1st target 100 yard 3 shot group in video) 99.5 gr 2836 fps (water jugs) [url]https://www.youtube.com/watch?v=opWQ64AfmEs[/url] [/QUOTE]
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Chinchaga 338 Cal 300 gr in 338 Edge with RL33
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