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Hunting
Extreme Long Range Hunting & Shooting (ELR)
338 or .375 AM
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<blockquote data-quote="royinidaho" data-source="post: 1181319" data-attributes="member: 2011"><p>With folks like Steve coming up with heavier than 350 grain offerings things definitely swing in the direction of a super hooty 375. Other wise the only advantage of a 375 AM over a 338 AM is 50 grains.</p><p></p><p>The 350 SMK is simply not enough bullet to bring the big 375 into its own.</p><p></p><p>I'm not able to stabilize 350/377 CEBs beyond a point somewhere between 628 and 980. Thus I've resorted to converting the SMKs to 353 grain brass pointed which increases bc significantly. Like 42" less drop at 1681 yards from an independent tester.</p><p></p><p>Since I began exploring with US-869 the 350/353 grain offerings are loafing along at slightly under 3300 fps MV. I was in the final stages of testing when the scope went south for the rest of the winter.:roll eyes:</p><p></p><p>Example of ES for a 3 shot group were 3278/3278/3276. Pretty darn good considering Retumbo resulted in too high of pressures at 3225 but the 869 groups and ES in the high 40s. Groups were the pitts however.</p><p></p><p>With a very slight tweak of seating depth the next 3 shots gave the same group size and 3323 fps average with single digit ES.</p><p></p><p>Got up to 157 grains of H-50 BMG with similar velocity and very low pressure and an enticing group when the scope went wonky. It's at Leuy at the moment.</p><p></p><p>My experience tells me that a 350+ grain offering moving along at 3200+ w/0.5 MOA or less consistency makes a fell wanna leave everything else in the safe.<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>Also I've got the big girl to under 16 pounds and it's still a pleasure to shoot.</p><p></p><p>Either cartridge will do what needs to be down, in fact, both cartridges are over kill except for possibly UFOs. I can almost guarantee that if you go with the 375 you'll never yearn for something bigger.<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin :D" loading="lazy" data-shortname=":D" /></p></blockquote><p></p>
[QUOTE="royinidaho, post: 1181319, member: 2011"] With folks like Steve coming up with heavier than 350 grain offerings things definitely swing in the direction of a super hooty 375. Other wise the only advantage of a 375 AM over a 338 AM is 50 grains. The 350 SMK is simply not enough bullet to bring the big 375 into its own. I'm not able to stabilize 350/377 CEBs beyond a point somewhere between 628 and 980. Thus I've resorted to converting the SMKs to 353 grain brass pointed which increases bc significantly. Like 42" less drop at 1681 yards from an independent tester. Since I began exploring with US-869 the 350/353 grain offerings are loafing along at slightly under 3300 fps MV. I was in the final stages of testing when the scope went south for the rest of the winter.:roll eyes: Example of ES for a 3 shot group were 3278/3278/3276. Pretty darn good considering Retumbo resulted in too high of pressures at 3225 but the 869 groups and ES in the high 40s. Groups were the pitts however. With a very slight tweak of seating depth the next 3 shots gave the same group size and 3323 fps average with single digit ES. Got up to 157 grains of H-50 BMG with similar velocity and very low pressure and an enticing group when the scope went wonky. It's at Leuy at the moment. My experience tells me that a 350+ grain offering moving along at 3200+ w/0.5 MOA or less consistency makes a fell wanna leave everything else in the safe.:) Also I've got the big girl to under 16 pounds and it's still a pleasure to shoot. Either cartridge will do what needs to be down, in fact, both cartridges are over kill except for possibly UFOs. I can almost guarantee that if you go with the 375 you'll never yearn for something bigger.:D [/QUOTE]
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Extreme Long Range Hunting & Shooting (ELR)
338 or .375 AM
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