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Rifles, Reloading, Optics, Equipment
7mm STW
7mm STW Brotherhood - For those who shoot the 7mm Shooting Times Westerner
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<blockquote data-quote="7stw" data-source="post: 714515" data-attributes="member: 22854"><p>I am told, and was told by a rep from federal, that the difference between the standard 215" and the GM 215 is consistentcy. There is no difference in the heat at all. That being said, and if my memory serves me right, yes the loads with the " GM " suffix have shown lower SD, ES. I can say the same for CCI 200, and the bench rest primers too. I have a new batch of the 215 GM primers, and in what I have shot them into of recent" seems " to be on the better side. But in all actuality, you would have to do a " A- B" test, with the only variable being the 215' and the 215 GM. </p><p>As far as the use of standard primers, to lower ES, and SD, this has been my experience. There is a rule of thumb, ( but not etched in stone), that a standard primer can be used in a cartridge with up to 80 grains, and still get good ignition. Now, if I were to play that game, my choice would NOT be the 210 however. The hottest standard primer is the Winchester WLR, hands down. </p><p>I have a 700 p in seven mag, that I run the WLR primer into, and it is unbelievable the accuracy, and low ES, SD that I get from that rifle. Some say that the cutoff is 70 grains, some say 80. Moreover, it is really the powder type you are trying to light. Additionally, temperature would come into play as well. To figure that out, you would have to do a " R and D" session to see. My cousin uses WLR primers in his 300 win mag, and has had no problems. He is using IMR 4350 powder, which is relatively easy to ignite. I guess a trial and error session would be the real tell tale my friend. </p><p></p><p>P/ S, LESS than three weeks and counting. Bags are packed!!!!!</p></blockquote><p></p>
[QUOTE="7stw, post: 714515, member: 22854"] I am told, and was told by a rep from federal, that the difference between the standard 215" and the GM 215 is consistentcy. There is no difference in the heat at all. That being said, and if my memory serves me right, yes the loads with the " GM " suffix have shown lower SD, ES. I can say the same for CCI 200, and the bench rest primers too. I have a new batch of the 215 GM primers, and in what I have shot them into of recent" seems " to be on the better side. But in all actuality, you would have to do a " A- B" test, with the only variable being the 215' and the 215 GM. As far as the use of standard primers, to lower ES, and SD, this has been my experience. There is a rule of thumb, ( but not etched in stone), that a standard primer can be used in a cartridge with up to 80 grains, and still get good ignition. Now, if I were to play that game, my choice would NOT be the 210 however. The hottest standard primer is the Winchester WLR, hands down. I have a 700 p in seven mag, that I run the WLR primer into, and it is unbelievable the accuracy, and low ES, SD that I get from that rifle. Some say that the cutoff is 70 grains, some say 80. Moreover, it is really the powder type you are trying to light. Additionally, temperature would come into play as well. To figure that out, you would have to do a " R and D" session to see. My cousin uses WLR primers in his 300 win mag, and has had no problems. He is using IMR 4350 powder, which is relatively easy to ignite. I guess a trial and error session would be the real tell tale my friend. P/ S, LESS than three weeks and counting. Bags are packed!!!!! [/QUOTE]
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Rifles, Reloading, Optics, Equipment
7mm STW
7mm STW Brotherhood - For those who shoot the 7mm Shooting Times Westerner
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