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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
300 grn 338 Berger test @ 3000+fps
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<blockquote data-quote="RDM416" data-source="post: 456900" data-attributes="member: 3745"><p>Got in a little trigger time today.<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p> </p><p>Rifle: 338 Kubla Khan, built by Kirby at APS. Nesika action, 30"Lilja, PK brake, A5 stock, NF NXS 5.5-22X56. Rifle has about 100 rounds down the new barrel just intalled by Kirby. </p><p> </p><p>I set out to test changes (if any) from changing the seating depth of the 300 grain Bergers. I loaded 3 sets of 3 rounds using 105 grains of Retumbo, Fed 215M. </p><p> </p><p>I have shot the Bergers in my other Khan, but this is first Bergers I have shot from this rifle. Load was based on development done on a different rifle at lower velocity of 2875fps using 102 grains of Retumbo. </p><p> </p><p>The average speed as checked on an Oehler model 35 with 3 sky screens = 3024fps. </p><p> </p><p>The test range was 300 yards with a 5 to 8 mph variable wind from left to right. </p><p> </p><p>Group 1: 3022fps / 3017fps / 3024fps</p><p>Bullets seated .009 off the lands. </p><p>Group size in in MOA = a little under 1/2 moa</p><p> </p><p><img src="http://i1232.photobucket.com/albums/ff367/rmarsh501/th_IMG_20110106_144558.jpg?t=1294355423" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p> </p><p>Group 2: 3024fps / 3022fps / 3018fps</p><p>Bullets seated .006 off the lands</p><p>Group size in MOA = Just over 1/4 moa</p><p><img src="http://i1232.photobucket.com/albums/ff367/rmarsh501/th_IMG_20110106_144540.jpg?t=1294355423" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p> </p><p>Group 3: 3032fps / 3027fps / 3032fps</p><p>Bullets seated .003 off the lands</p><p>Group size in MOA = 3/4 moa</p><p><img src="http://i1232.photobucket.com/albums/ff367/rmarsh501/th_IMG_20110106_144550.jpg?t=1294355423" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p>Shot #3 on group 3 could have been me, the shot did not "feel" good, but I did not have another round loaded to try again.</p><p> </p><p>Other than shot 3 group 3 the groups were shrinking in size as the seating depth got closer to the lands. </p><p> </p><p>Velocity took a noticable jump on group 3 which would indicate pressures are going up as the bullet has less room to "jump". </p><p> </p><p>Conclusion........ More testing needed, guess I'll just have to shoot some more.<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite11" alt=":rolleyes:" title="Roll Eyes :rolleyes:" loading="lazy" data-shortname=":rolleyes:" /></p><p> </p><p>Maybe conclusions: IF, big IF..... shot 3 group 3 was me, the Bergers look like they will handle 3000+fps with this rifle and load. </p><p> </p><p>Now that I know this rifle likes the Bergers seated close to the lands, I will do the same type test with powder charges and probably try some other powders... H1000, 50BMG, and RL25 are the usual suspects. With the powder fine tuned I think it is very possible to get her to shooting 1/4 moa with the bergers. </p><p> </p><p>Comments, and suggestions welcome. Just thought the 338 guys out there would like to know the result of a test of the 300 grain Bergers at over 3000fps.</p></blockquote><p></p>
[QUOTE="RDM416, post: 456900, member: 3745"] Got in a little trigger time today.:) Rifle: 338 Kubla Khan, built by Kirby at APS. Nesika action, 30"Lilja, PK brake, A5 stock, NF NXS 5.5-22X56. Rifle has about 100 rounds down the new barrel just intalled by Kirby. I set out to test changes (if any) from changing the seating depth of the 300 grain Bergers. I loaded 3 sets of 3 rounds using 105 grains of Retumbo, Fed 215M. I have shot the Bergers in my other Khan, but this is first Bergers I have shot from this rifle. Load was based on development done on a different rifle at lower velocity of 2875fps using 102 grains of Retumbo. The average speed as checked on an Oehler model 35 with 3 sky screens = 3024fps. The test range was 300 yards with a 5 to 8 mph variable wind from left to right. Group 1: 3022fps / 3017fps / 3024fps Bullets seated .009 off the lands. Group size in in MOA = a little under 1/2 moa [IMG]http://i1232.photobucket.com/albums/ff367/rmarsh501/th_IMG_20110106_144558.jpg?t=1294355423[/IMG] Group 2: 3024fps / 3022fps / 3018fps Bullets seated .006 off the lands Group size in MOA = Just over 1/4 moa [IMG]http://i1232.photobucket.com/albums/ff367/rmarsh501/th_IMG_20110106_144540.jpg?t=1294355423[/IMG] Group 3: 3032fps / 3027fps / 3032fps Bullets seated .003 off the lands Group size in MOA = 3/4 moa [IMG]http://i1232.photobucket.com/albums/ff367/rmarsh501/th_IMG_20110106_144550.jpg?t=1294355423[/IMG] Shot #3 on group 3 could have been me, the shot did not "feel" good, but I did not have another round loaded to try again. Other than shot 3 group 3 the groups were shrinking in size as the seating depth got closer to the lands. Velocity took a noticable jump on group 3 which would indicate pressures are going up as the bullet has less room to "jump". Conclusion........ More testing needed, guess I'll just have to shoot some more.:rolleyes: Maybe conclusions: IF, big IF..... shot 3 group 3 was me, the Bergers look like they will handle 3000+fps with this rifle and load. Now that I know this rifle likes the Bergers seated close to the lands, I will do the same type test with powder charges and probably try some other powders... H1000, 50BMG, and RL25 are the usual suspects. With the powder fine tuned I think it is very possible to get her to shooting 1/4 moa with the bergers. Comments, and suggestions welcome. Just thought the 338 guys out there would like to know the result of a test of the 300 grain Bergers at over 3000fps. [/QUOTE]
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300 grn 338 Berger test @ 3000+fps
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