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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Pushing a .338 as fast as possible
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<blockquote data-quote="MontanaMarine" data-source="post: 23071" data-attributes="member: 268"><p>Jerry, </p><p></p><p> I would estimate that the odds of a first round hit on an elk at 10,000 meters with a 155mm ( We still have 105s in the inventory, but the M198 155mm howitzer is the workhorse in the USMC)is far worse than 1 in 200. I'm not talking about effective casualty radius, I mean steel on steel, errrr...steel on fur <img src="http://images/icons/grin.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /> <img src="http://images/icons/shocked.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /> <img src="http://images/icons/grin.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /> .</p><p></p><p> As far as mechanical accuracy on a howitzer, well thats classified. The guys who calculate the firing solution are in the FDC(Fire Direction Center) The FDC sends a Quadrant, Deflection, and charge ( and shell/fuze/fuze setting) to the gun line. I am not a detailed expert in this aspect of the operation, because as an FO, I spend my time out front with the supported infantry, doing my piece. Anyway, the FDC arrives at their firing solution after factoring many things some of them, that come immediately to mind:</p><p>Range to tgt</p><p>elevation</p><p>air temp</p><p>powder temp( how hot is the gun?)</p><p>barometric pressure</p><p>humidity</p><p>wind</p><p>powder lot</p><p>projo lot</p><p>fuze lot</p><p>barrel age (rounds fired at different charges)</p><p>muzzle velocity(each round is recorded, dependingb on the Btry or Bn Cmdr)</p><p>earth rotation</p><p></p><p>I know I have missed a few factors, but it is pretty comprehensive. Keep in mind that the Marine Corps is not noted for lots of new equipment( our barrels, and howitzers are well used) </p><p></p><p>I will tell you that one gun firing by itself can put succesive rounds a pattern generally within 50 meters or so on flat terrain at around 14000-16000 meters. Max range with RAP (Rocket Assisted Projectile) is over 25,000 meters. </p><p></p><p> Generally, a Battery(6 guns) or a Battalion (18 guns) will shoot the FFE (Fire For Effect)with each gun given a different firing solution to maximize the desired effect, based on the shape/size of the target. We normally disperse the FFE over a large area, up to several hundred meters in width depth or both.</p><p></p><p> When real precision on a point target is required, we load up a round called copperhead. Copperhead is a semi-active laser guided projectile. It contains a laser seeker and can steer itself to a point designated by a spotter illuminating the target with a laser. (this one can shoot minute of elk out to max range, but costs $10,000.00 a pop <img src="http://images/icons/shocked.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /> <img src="http://images/icons/shocked.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /> )</p><p></p><p>Good shootin'. And thanks for your feedback. MM</p><p></p><p>[ 11-08-2002: Message edited by: MontanaMarine ]</p></blockquote><p></p>
[QUOTE="MontanaMarine, post: 23071, member: 268"] Jerry, I would estimate that the odds of a first round hit on an elk at 10,000 meters with a 155mm ( We still have 105s in the inventory, but the M198 155mm howitzer is the workhorse in the USMC)is far worse than 1 in 200. I'm not talking about effective casualty radius, I mean steel on steel, errrr...steel on fur [img]images/icons/grin.gif[/img] [img]images/icons/shocked.gif[/img] [img]images/icons/grin.gif[/img] . As far as mechanical accuracy on a howitzer, well thats classified. The guys who calculate the firing solution are in the FDC(Fire Direction Center) The FDC sends a Quadrant, Deflection, and charge ( and shell/fuze/fuze setting) to the gun line. I am not a detailed expert in this aspect of the operation, because as an FO, I spend my time out front with the supported infantry, doing my piece. Anyway, the FDC arrives at their firing solution after factoring many things some of them, that come immediately to mind: Range to tgt elevation air temp powder temp( how hot is the gun?) barometric pressure humidity wind powder lot projo lot fuze lot barrel age (rounds fired at different charges) muzzle velocity(each round is recorded, dependingb on the Btry or Bn Cmdr) earth rotation I know I have missed a few factors, but it is pretty comprehensive. Keep in mind that the Marine Corps is not noted for lots of new equipment( our barrels, and howitzers are well used) I will tell you that one gun firing by itself can put succesive rounds a pattern generally within 50 meters or so on flat terrain at around 14000-16000 meters. Max range with RAP (Rocket Assisted Projectile) is over 25,000 meters. Generally, a Battery(6 guns) or a Battalion (18 guns) will shoot the FFE (Fire For Effect)with each gun given a different firing solution to maximize the desired effect, based on the shape/size of the target. We normally disperse the FFE over a large area, up to several hundred meters in width depth or both. When real precision on a point target is required, we load up a round called copperhead. Copperhead is a semi-active laser guided projectile. It contains a laser seeker and can steer itself to a point designated by a spotter illuminating the target with a laser. (this one can shoot minute of elk out to max range, but costs $10,000.00 a pop [img]images/icons/shocked.gif[/img] [img]images/icons/shocked.gif[/img] ) Good shootin'. And thanks for your feedback. MM [ 11-08-2002: Message edited by: MontanaMarine ] [/QUOTE]
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