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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
338 ulta verses 338 kt mag
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<blockquote data-quote="Guest" data-source="post: 21083"><p>Darryl,</p><p> Thank you for your input. I had read your previous posts and Dan Lilja's comments concerning the actual BC of the 300 MK. We used .798 to compute our drop chart for the 338 Ultra and it matched the actual shooting data we collected last Sunday. Peter's and Dave's excel spreadsheet is the most accurate cacluator that I have used. The price was right too, thanks again to them.</p><p> I do have a question that maybe you could share some insights on. I think the rifle is dumping rounds to the right at longer ranges. We are shooting from bags and we have a scope level. We zeroed the rifle for the 300 MK at 100 yds and checked the velocity of the load (90.0 gns/H1000/Fed 215GM/once fired-neck sized cases for av-2688 fps & S/D of 24). At 620 yds the bullets were impacting 3" right. We had to progressively add more left adjustment into the scope as the ranges increased. The farthest distance that we shot was 1610 yards. With the scope set at 50 1/2 moa up and 0 windage, the bullet impact was right on for elevation but 24" and 36" right for two rounds. It was an absolute calm day with no wind and all ranges fired showed the same horizonal dispersion. What should I check for in the rifle/scope system? And what about the load? Or is this normal behavior from a factory rifle and barrel?</p><p> Thanks for the compliments about Colorado. I feel very fortunate to live here with all the outdoor activities that abound, especially elk hunting. You were probably refering to the Loveland ski area on I70 from my signature. We live in Loveland (the town) north of Denver. My wife and I (the kids too...) own land a few miles north of Rocky Mountain Natl Park. This is where my son and I hang out and shoot. Great hunting and fishing and it's our backyard.</p><p></p><p>Thanks in advance for any thoughts.</p></blockquote><p></p>
[QUOTE="Guest, post: 21083"] Darryl, Thank you for your input. I had read your previous posts and Dan Lilja's comments concerning the actual BC of the 300 MK. We used .798 to compute our drop chart for the 338 Ultra and it matched the actual shooting data we collected last Sunday. Peter's and Dave's excel spreadsheet is the most accurate cacluator that I have used. The price was right too, thanks again to them. I do have a question that maybe you could share some insights on. I think the rifle is dumping rounds to the right at longer ranges. We are shooting from bags and we have a scope level. We zeroed the rifle for the 300 MK at 100 yds and checked the velocity of the load (90.0 gns/H1000/Fed 215GM/once fired-neck sized cases for av-2688 fps & S/D of 24). At 620 yds the bullets were impacting 3" right. We had to progressively add more left adjustment into the scope as the ranges increased. The farthest distance that we shot was 1610 yards. With the scope set at 50 1/2 moa up and 0 windage, the bullet impact was right on for elevation but 24" and 36" right for two rounds. It was an absolute calm day with no wind and all ranges fired showed the same horizonal dispersion. What should I check for in the rifle/scope system? And what about the load? Or is this normal behavior from a factory rifle and barrel? Thanks for the compliments about Colorado. I feel very fortunate to live here with all the outdoor activities that abound, especially elk hunting. You were probably refering to the Loveland ski area on I70 from my signature. We live in Loveland (the town) north of Denver. My wife and I (the kids too...) own land a few miles north of Rocky Mountain Natl Park. This is where my son and I hang out and shoot. Great hunting and fishing and it's our backyard. Thanks in advance for any thoughts. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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338 ulta verses 338 kt mag
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