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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
I finally got to shoot my new 300 Ultra
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<blockquote data-quote="ss8541" data-source="post: 21335" data-attributes="member: 104"><p>The weather here in Reno has been bad, so I have been dying to shoot my new rifle since I picked it up last week. I finally got out this morning and did some load development at 500. The wind really got the best of me though. My best 3-shot group was 2.2", with the 240 MK going 3004 (ave. vel. for group). I did have several, in fact nearly all, groups with 2 in 1" and another pushed a few inches to the side from the changing wind. The wind was a constantly changing 5-12mph. My largest group was 6.24", so I didn't have a real good average. I did get a feel for the gun though. </p><p> I specified a .338 kneck and a throat to allow me to run VLD's out a bit for max net case capacity. The problem is that I can only run the 240 MK at an COAL. of 3.69 with it's stubby nose, so it eats up a lot of case capacity. I think that even with my 29.5" barrel I will top out at 3050. I shot one load to check preasure at 3050 and didn't get any presure signs, but I had ejector marks at 3100. I found that H870 was the best so far. 101.2 grains gives me 3004 fps, with the bullet touching the lands. I have thought about backing it off to maybe .005-.008 out to see if this helps with the pressure problem. What do you guys think? I obviously need to work on a better accuracy load while I am at it , but at least I have the ball rolling. Another problem I ran into was using a 100 yard target in mirrage at that range. I think I will make up some 3" white squares with 2" black borders. The 100 yard targets just turned into a confusing blob through my Nightforce. Any helpfull input would be appreciated.</p><p>Thanks,</p><p>Vince</p></blockquote><p></p>
[QUOTE="ss8541, post: 21335, member: 104"] The weather here in Reno has been bad, so I have been dying to shoot my new rifle since I picked it up last week. I finally got out this morning and did some load development at 500. The wind really got the best of me though. My best 3-shot group was 2.2", with the 240 MK going 3004 (ave. vel. for group). I did have several, in fact nearly all, groups with 2 in 1" and another pushed a few inches to the side from the changing wind. The wind was a constantly changing 5-12mph. My largest group was 6.24", so I didn't have a real good average. I did get a feel for the gun though. I specified a .338 kneck and a throat to allow me to run VLD's out a bit for max net case capacity. The problem is that I can only run the 240 MK at an COAL. of 3.69 with it's stubby nose, so it eats up a lot of case capacity. I think that even with my 29.5" barrel I will top out at 3050. I shot one load to check preasure at 3050 and didn't get any presure signs, but I had ejector marks at 3100. I found that H870 was the best so far. 101.2 grains gives me 3004 fps, with the bullet touching the lands. I have thought about backing it off to maybe .005-.008 out to see if this helps with the pressure problem. What do you guys think? I obviously need to work on a better accuracy load while I am at it , but at least I have the ball rolling. Another problem I ran into was using a 100 yard target in mirrage at that range. I think I will make up some 3" white squares with 2" black borders. The 100 yard targets just turned into a confusing blob through my Nightforce. Any helpfull input would be appreciated. Thanks, Vince [/QUOTE]
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I finally got to shoot my new 300 Ultra
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