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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Badlands Precision Bullets thread - From BC to terminal ballistics
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<blockquote data-quote="nralifer" data-source="post: 2732772" data-attributes="member: 94556"><p>For hunting purposes you don't need 5 shot groups. In the hunting situation THE most important shot is the cold bore shot. The object is one shot, one kill. Two shot groups are the most relevant. If your cold bore shot and the follow up shot are within 1/2" of each other and your first shot hit the point of aim then you are good. 5 shot groups add other variables such as barrel creep with heating. Many hunting rifles have thinner barrels to save weight, which increases vibration amplitude of the barrel and faster heating because the heat capacity of the barrel is low, as is the stiffness. This makes it harder to shoot tight groups with more than 2 shots. I use a 20" long 0.9" muzzle .308 Win which is very stiff, vibrates at a low amplitude and is long enough to generate 2950 fps with a 150 gr BD2 bullet with a G1 BC equivalent to the 185 Berger Juggernaut and better penetration at virtually all distances. Weight is about 9.5 lbs, light enough to carry all day, but heavy enough to absorb recoil which can further be mitigated by a short suppressor or muzzle brake.</p></blockquote><p></p>
[QUOTE="nralifer, post: 2732772, member: 94556"] For hunting purposes you don’t need 5 shot groups. In the hunting situation THE most important shot is the cold bore shot. The object is one shot, one kill. Two shot groups are the most relevant. If your cold bore shot and the follow up shot are within 1/2” of each other and your first shot hit the point of aim then you are good. 5 shot groups add other variables such as barrel creep with heating. Many hunting rifles have thinner barrels to save weight, which increases vibration amplitude of the barrel and faster heating because the heat capacity of the barrel is low, as is the stiffness. This makes it harder to shoot tight groups with more than 2 shots. I use a 20” long 0.9” muzzle .308 Win which is very stiff, vibrates at a low amplitude and is long enough to generate 2950 fps with a 150 gr BD2 bullet with a G1 BC equivalent to the 185 Berger Juggernaut and better penetration at virtually all distances. Weight is about 9.5 lbs, light enough to carry all day, but heavy enough to absorb recoil which can further be mitigated by a short suppressor or muzzle brake. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Badlands Precision Bullets thread - From BC to terminal ballistics
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