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Long Range Hunting & Shooting
Longrange PD cartridge - Part II
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<blockquote data-quote="lynn" data-source="post: 7883" data-attributes="member: 1479"><p>To answer Varmint Hunters questions yes two bullets with the same bc fired at the same speed reach the target at the same time(same flight time),have the same amount of drop and or affected by the wind the same amount.The only difference is the retained energy at the target.The 22/243 isn't as inherently accurate as a 6br and small things such as fouling disrupt the smaller bullet to a larger degree.Due to the high bc of some bullets the 22 was tried at 1000 yards but bc alone doesn't mean anything without accuracy and that is why they aren't used .Remember Lost River sells .930 bc 30 cal 220 gr J40 bullets which are much better BC wise than anything mentioned even 300 gr Sierra 338 cal but nobody shoots them because they simply don't shoot accurately enough for a competition rig.Another case would be Sierras 155 gr 6.5mm with its higher bc number than the 142's if it aint accurate forget it.</p><p>I have a 6/284 that shoots the 107's to a little over 3400 fps but best accuracy is at 3200 fps so it sits in the closet.My 6-06 shoots the 107's very accurately at 3433 fps with 57 grains of H1000 a Fed 210M primer and Lapua 30-06 brass necked down so it gets used all the time.When the barrels wear out the tide may change and the 6/284 may shoot better at the upper velocity range and therefore get used more often.The Sierra Match bullets tend to be easier to keep tuned and easier to tune initially in my opinion so they get the nod when it comes to extended sessions of Prairie Doggin.Run a ballistic program on the 6mm 107 at 3433 fps coupled with great accuracy and you have a winning combination.</p><p>Lynn</p></blockquote><p></p>
[QUOTE="lynn, post: 7883, member: 1479"] To answer Varmint Hunters questions yes two bullets with the same bc fired at the same speed reach the target at the same time(same flight time),have the same amount of drop and or affected by the wind the same amount.The only difference is the retained energy at the target.The 22/243 isn't as inherently accurate as a 6br and small things such as fouling disrupt the smaller bullet to a larger degree.Due to the high bc of some bullets the 22 was tried at 1000 yards but bc alone doesn't mean anything without accuracy and that is why they aren't used .Remember Lost River sells .930 bc 30 cal 220 gr J40 bullets which are much better BC wise than anything mentioned even 300 gr Sierra 338 cal but nobody shoots them because they simply don't shoot accurately enough for a competition rig.Another case would be Sierras 155 gr 6.5mm with its higher bc number than the 142's if it aint accurate forget it. I have a 6/284 that shoots the 107's to a little over 3400 fps but best accuracy is at 3200 fps so it sits in the closet.My 6-06 shoots the 107's very accurately at 3433 fps with 57 grains of H1000 a Fed 210M primer and Lapua 30-06 brass necked down so it gets used all the time.When the barrels wear out the tide may change and the 6/284 may shoot better at the upper velocity range and therefore get used more often.The Sierra Match bullets tend to be easier to keep tuned and easier to tune initially in my opinion so they get the nod when it comes to extended sessions of Prairie Doggin.Run a ballistic program on the 6mm 107 at 3433 fps coupled with great accuracy and you have a winning combination. Lynn [/QUOTE]
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