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Ballistic Coefficient Question
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<blockquote data-quote="Michael Eichele" data-source="post: 900567" data-attributes="member: 1007"><p>It's simple really. Equal form factors and equal weights, the smaller caliber wins in the BC department. That said, the larger caliber will always have higher BC potential with heavier weight capabilities. Imagine trying to get a 22 cal bullet to equal that of a 50 bmg. The same principal applies to every caliber between them.</p><p></p><p>You will always give up something to gain another. The 300 WM will always have the potential to hit harder than a version necked down to 7mm. The downside is more recoil. The benefits are greater down range energy AND barrel longevity. Bigger bores also drive equal bullet weights faster than their smaller competitors, case dimensions and barrel lengths being equal.</p><p></p><p>Each has their own strengths and weaknesses but pure ballistic performance alone, the 300 WM will eat the 7mm RM.</p><p></p><p>Compare the 180 vld 7mm bullet at 3000'sec versus the 215 hybrid 30 cal bullet at 2900'sec. energies at the muzzle and at 1300 yards and everywhere between as well as wind drift. </p><p></p><p>Trajectory means virtually nothing these days. Laser rangefinders and adjustable turrets or holdover reticles solve the range and drop problem. It's the wind you need to beat in this game. It's not as predictable as drops. At least the wind conditions themselves that is. Higher BC bullets drift less period. Compare a 30 cal 168 smk at 3400'sec versus a 208 amax at 2650'sec at 1000 yards and 10 mph. Energy too for that matter.</p><p></p><p>Hard to go wrong with either but I give the nod to the 300 WM between the two. I don't like recoil either but when I'm looking at a trophy bull moose or elk at beyond 1/2 mile, I want the mass and higher energy. I shoot 308 winnies and 6.5x284s for everything else. If you can stomach the short life of the 6.5x284, it's a great low recoiling performer equal to the 300 WM minus the energy. Trajectory and windage are the same and also with high sectional density. The performance to recoil ratio is near unbeatable with the 6.5x284</p></blockquote><p></p>
[QUOTE="Michael Eichele, post: 900567, member: 1007"] It's simple really. Equal form factors and equal weights, the smaller caliber wins in the BC department. That said, the larger caliber will always have higher BC potential with heavier weight capabilities. Imagine trying to get a 22 cal bullet to equal that of a 50 bmg. The same principal applies to every caliber between them. You will always give up something to gain another. The 300 WM will always have the potential to hit harder than a version necked down to 7mm. The downside is more recoil. The benefits are greater down range energy AND barrel longevity. Bigger bores also drive equal bullet weights faster than their smaller competitors, case dimensions and barrel lengths being equal. Each has their own strengths and weaknesses but pure ballistic performance alone, the 300 WM will eat the 7mm RM. Compare the 180 vld 7mm bullet at 3000'sec versus the 215 hybrid 30 cal bullet at 2900'sec. energies at the muzzle and at 1300 yards and everywhere between as well as wind drift. Trajectory means virtually nothing these days. Laser rangefinders and adjustable turrets or holdover reticles solve the range and drop problem. It's the wind you need to beat in this game. It's not as predictable as drops. At least the wind conditions themselves that is. Higher BC bullets drift less period. Compare a 30 cal 168 smk at 3400'sec versus a 208 amax at 2650'sec at 1000 yards and 10 mph. Energy too for that matter. Hard to go wrong with either but I give the nod to the 300 WM between the two. I don't like recoil either but when I'm looking at a trophy bull moose or elk at beyond 1/2 mile, I want the mass and higher energy. I shoot 308 winnies and 6.5x284s for everything else. If you can stomach the short life of the 6.5x284, it's a great low recoiling performer equal to the 300 WM minus the energy. Trajectory and windage are the same and also with high sectional density. The performance to recoil ratio is near unbeatable with the 6.5x284 [/QUOTE]
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