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Long Range Hunting & Shooting
Converting a 300wm to 300nm
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<blockquote data-quote="AKdan" data-source="post: 1442257" data-attributes="member: 83800"><p>IdahoCTD - </p><p></p><p>I am curious as to why you think that 416 Stainless is not as strong as 4130 Steel. </p><p>The yield strength of 416 is greater than 4130 at equal hardness. The ultimate yield of 416 varies a lot, but the critical strength is fairly equal favoring 416. This is of course contingent on the heat treatment...I suspect that the difference between a Remington action of either metal and a custom job of either metal is the control of the processes for heat treatment of the steel AND then the precision of the final machine work. I personally have no qualms with lapua bolt face on a Remington receiver of either 416 or 4130. I would however not do anything to reduce the hardness (tempering, which includes SOME processes of nitriding) and would use a bolt that was treated to a specific hardness and machined with tighter tolerances and quality than perhaps a Factory unit.</p><p></p><p>I may not be aware of something and would like to learn more as I have enjoyed studying the subject to some depth. Perhaps we could start a new thread to gather together other people who know more about metallurgy then myself. I built a 338 Lapua on a 4130 (ultramag) Action with a PTG bolt(4130). I did this based on a recommendation that the 4130 steel would be more resistant to Lug setback. I started studying about the properties of various steel researching nitriding and am now regretting not having used a Stainless receiver for corrosion resistance as there is no calculable difference in strength(unless you have each action Rockwell tested). </p><p></p><p>To the Original Poster.-</p><p></p><p>Setting up a Remington to accept the Lapua BF was simple with a PTG bolt. I am very happy with it although I had mine fluted with the Large spiral fluting and it is not as glassy as my minimally fluted bolts. Opening up the feed rails is ......easy... you wont want to actually use them as the action will likely not feed well in a stagger set up. I tried to use an ultramag extended box but could not get the rounds to feed without a second round popping up during rapid bolt manipulation. The Wyatts center feed mag resolved this issue and I machined the feed lips for the center feed/ DBM. The downside to the Rem 700(or clone) with a floor plate and a Lapua sized case is that you are limited to 2 rounds in the magazine unless you run a DBM set-up. I am planning to build a switch-barrel 300/338/375 Norma off a Remington or Clone. Good Luck with your build.</p><p></p><p>Thanks,</p><p></p><p>Dan</p></blockquote><p></p>
[QUOTE="AKdan, post: 1442257, member: 83800"] IdahoCTD - I am curious as to why you think that 416 Stainless is not as strong as 4130 Steel. The yield strength of 416 is greater than 4130 at equal hardness. The ultimate yield of 416 varies a lot, but the critical strength is fairly equal favoring 416. This is of course contingent on the heat treatment...I suspect that the difference between a Remington action of either metal and a custom job of either metal is the control of the processes for heat treatment of the steel AND then the precision of the final machine work. I personally have no qualms with lapua bolt face on a Remington receiver of either 416 or 4130. I would however not do anything to reduce the hardness (tempering, which includes SOME processes of nitriding) and would use a bolt that was treated to a specific hardness and machined with tighter tolerances and quality than perhaps a Factory unit. I may not be aware of something and would like to learn more as I have enjoyed studying the subject to some depth. Perhaps we could start a new thread to gather together other people who know more about metallurgy then myself. I built a 338 Lapua on a 4130 (ultramag) Action with a PTG bolt(4130). I did this based on a recommendation that the 4130 steel would be more resistant to Lug setback. I started studying about the properties of various steel researching nitriding and am now regretting not having used a Stainless receiver for corrosion resistance as there is no calculable difference in strength(unless you have each action Rockwell tested). To the Original Poster.- Setting up a Remington to accept the Lapua BF was simple with a PTG bolt. I am very happy with it although I had mine fluted with the Large spiral fluting and it is not as glassy as my minimally fluted bolts. Opening up the feed rails is ......easy... you wont want to actually use them as the action will likely not feed well in a stagger set up. I tried to use an ultramag extended box but could not get the rounds to feed without a second round popping up during rapid bolt manipulation. The Wyatts center feed mag resolved this issue and I machined the feed lips for the center feed/ DBM. The downside to the Rem 700(or clone) with a floor plate and a Lapua sized case is that you are limited to 2 rounds in the magazine unless you run a DBM set-up. I am planning to build a switch-barrel 300/338/375 Norma off a Remington or Clone. Good Luck with your build. Thanks, Dan [/QUOTE]
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