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Rifles, Bullets, Barrels & Ballistics
Rem 700 vs Wby MkV in bolt locking lug comparisions....
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<blockquote data-quote="Hired Gun" data-source="post: 90094" data-attributes="member: 1290"><p>I'll try to stay on task here but I have lots of thoughts pertaining to the 700 verses Mark V decision.</p><p></p><p>Given the simple math, I agree that on the surface the shear area of the two are comparable but from my racing background I two have observed that many small lugs, splines or threads are always stronger than a couple big ones. I can't explain why but it is a proven fact. Might be something to due with the fact that a fracture of one can easily travel through the mass of any one but is harder to initiate fracture through all of them. </p><p></p><p>Accuracy potential wise, I personally believe as Dan Lilja and others have stated that a bolt head supported on three sides is more stable at the moment of firing than a two lug design. Furthermore the success of a two lug design is largely dependant of achieving 100 percent lug contact to help stabilize the bolt and eliminate flex. The two lug design is also highly dependant on the fit of the bolt in the raceway. That is why the Remington's show marked improvement from the use of bolt sleeves and oversize bolt bodies to further help stabilize the two lug design. A bolt head bolt such as the Sako, Weatherby and the Geske action is supported on three sides. Dan Lilja states, "Gerry (Geske) also believes that three lugs provide a more stable bolt face. One less subject to vibrational effects than a two lug design." The Weatherby and the Geske action strengths and stabilities are further enhanced by the lack of bolt lug raceways and their full diameter bolt bodies. The Mark 5 Bolt body is .841" in diameter where as the 700 is only about .705" or so. That's more than an 1/8" bigger in a world that is measuring the differences in the hundredths and thousandths column. This massive shaft behind the bolt face has got to help support the bolt face from flexing. </p><p></p><p>It was also brought up that the recoil lug if properly fitted help support the barrel on a 700. I submit that upon firing even if properly fitted and super thick/strong etc it still imparts a shock to the barrel action joint. The Mark V has the recoil lug built into the bottom of the action so upon firing it imparts no shock to the barrel action joint. </p><p></p><p>The Mark V action comes with a trigger that with only a spring mod or change will allow it to be adjusted well under 1 pound where the use of a 700 action is going to need an aftermarket trigger to achieve the same level of quality in trigger pull.</p><p></p><p>To sum up I believe that a production Mark 5 action is a superior design in both strength and accuracy potential when compared to a Remington.</p></blockquote><p></p>
[QUOTE="Hired Gun, post: 90094, member: 1290"] I’ll try to stay on task here but I have lots of thoughts pertaining to the 700 verses Mark V decision. Given the simple math, I agree that on the surface the shear area of the two are comparable but from my racing background I two have observed that many small lugs, splines or threads are always stronger than a couple big ones. I can't explain why but it is a proven fact. Might be something to due with the fact that a fracture of one can easily travel through the mass of any one but is harder to initiate fracture through all of them. Accuracy potential wise, I personally believe as Dan Lilja and others have stated that a bolt head supported on three sides is more stable at the moment of firing than a two lug design. Furthermore the success of a two lug design is largely dependant of achieving 100 percent lug contact to help stabilize the bolt and eliminate flex. The two lug design is also highly dependant on the fit of the bolt in the raceway. That is why the Remington’s show marked improvement from the use of bolt sleeves and oversize bolt bodies to further help stabilize the two lug design. A bolt head bolt such as the Sako, Weatherby and the Geske action is supported on three sides. Dan Lilja states, “Gerry (Geske) also believes that three lugs provide a more stable bolt face. One less subject to vibrational effects than a two lug design.” The Weatherby and the Geske action strengths and stabilities are further enhanced by the lack of bolt lug raceways and their full diameter bolt bodies. The Mark 5 Bolt body is .841” in diameter where as the 700 is only about .705” or so. That’s more than an 1/8” bigger in a world that is measuring the differences in the hundredths and thousandths column. This massive shaft behind the bolt face has got to help support the bolt face from flexing. It was also brought up that the recoil lug if properly fitted help support the barrel on a 700. I submit that upon firing even if properly fitted and super thick/strong etc it still imparts a shock to the barrel action joint. The Mark V has the recoil lug built into the bottom of the action so upon firing it imparts no shock to the barrel action joint. The Mark V action comes with a trigger that with only a spring mod or change will allow it to be adjusted well under 1 pound where the use of a 700 action is going to need an aftermarket trigger to achieve the same level of quality in trigger pull. To sum up I believe that a production Mark 5 action is a superior design in both strength and accuracy potential when compared to a Remington. [/QUOTE]
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