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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
338 Norma Improved.
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<blockquote data-quote="Rhovee" data-source="post: 1773450" data-attributes="member: 101820"><p>Here is some info I have for 338 NMI.</p><p> I am using:</p><p>24" barrel</p><p>Lapua brass </p><p>CCI 250's</p><p>300 grain EH Berger's</p><p>Built by Alex Wheeler</p><p>Fire formed with 300's +.015 in the lands with</p><p>85 grains H1000.</p><p>I started with H1000 and have excellent accuracy at typical non improved speeds. Ran up to 2830 before bolt click. Shot best at 2720 with 1" at 300 yard groups. Had one 3/4" group. </p><p></p><p>Then I tested some N570. Never did hit pressure, case gets to full. At 94.5 I can feel a slight crunch with powder while using 6" drop tube. Attached is a picture of a seating depth test I did tonight. There is some good consistency with accuracy and velocity in these groups. Total of .015 seating depth and all shot well. All shots had an Es of 20 and I might try Fed 215 and see if that changes. If not I will wait and shoot it at 1k and see what works the best.</p><p></p><p>Powder numbers;</p><p>H1000</p><p>89.5-2700 (Accuracy)</p><p>90-2715</p><p>90.5-2744</p><p>91-2750</p><p>91.5-2785</p><p>92-2810</p><p>92.5-2810</p><p></p><p>N570</p><p>91-2690</p><p>91.5-2704</p><p>92-2730</p><p>92.5-2759</p><p>93-2775</p><p>93.5 2772</p><p>94-2800 (accuracy)</p><p>94.5-2820 (accuracy)</p><p></p><p>Figured someone would be needing this info</p></blockquote><p></p>
[QUOTE="Rhovee, post: 1773450, member: 101820"] Here is some info I have for 338 NMI. I am using: 24” barrel Lapua brass CCI 250’s 300 grain EH Berger’s Built by Alex Wheeler Fire formed with 300’s +.015 in the lands with 85 grains H1000. I started with H1000 and have excellent accuracy at typical non improved speeds. Ran up to 2830 before bolt click. Shot best at 2720 with 1” at 300 yard groups. Had one 3/4” group. Then I tested some N570. Never did hit pressure, case gets to full. At 94.5 I can feel a slight crunch with powder while using 6” drop tube. Attached is a picture of a seating depth test I did tonight. There is some good consistency with accuracy and velocity in these groups. Total of .015 seating depth and all shot well. All shots had an Es of 20 and I might try Fed 215 and see if that changes. If not I will wait and shoot it at 1k and see what works the best. Powder numbers; H1000 89.5-2700 (Accuracy) 90-2715 90.5-2744 91-2750 91.5-2785 92-2810 92.5-2810 N570 91-2690 91.5-2704 92-2730 92.5-2759 93-2775 93.5 2772 94-2800 (accuracy) 94.5-2820 (accuracy) Figured someone would be needing this info [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
338 Norma Improved.
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