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Hunting
Long Range Hunting & Shooting
7RM or 7mm/300 win
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<blockquote data-quote="IdahoCTD" data-source="post: 933898" data-attributes="member: 13110"><p>This whole argument is why I rechamber a 7RM barrel to 7-300wm for my dad. He had a 24" barrel I rechambered to 7STW and the velocities he gets from it are way slower than either of my longer barreled 7-300's (27-28"). I told him he'd probably do just as well with a 7-300wm in a 24" barrel plus he can load to the rifling in a standard mag box with 162/168gr bullets. We will shoot my same load, 73gr H-1000 with a 162 Amax in RWS brass, to compare the velocity and accuracy. I would bet he is still in the 3100fps range that he was getting from the 7STW. </p><p></p><p>The bottom line is there is very little practical advantage to a 7STW or 7RUM loaded to standard mag length. If you want to add a Wyatt 4" mag box so the bullets can be seated where they need to be then both will start to run away from a 7-300wm.</p><p></p><p>Mud,</p><p></p><p>A 7STW at 3000fps with 180's is pretty pathetic really. A warm 7RM will do that and a 7-300wm will do well over 3100fps. As long as it shoots good leave it but I'd have a hard time being on the STW band wagon quoting velocities that low no matter what the pressure is like. There is a reason people shoot magnums and that is for speed. If I had to run a STW that slow to get a accurate load I'd sell it and build something else personally. To me that is like having a 8 second race car and running it in a 12 second class because it runs better there.</p></blockquote><p></p>
[QUOTE="IdahoCTD, post: 933898, member: 13110"] This whole argument is why I rechamber a 7RM barrel to 7-300wm for my dad. He had a 24" barrel I rechambered to 7STW and the velocities he gets from it are way slower than either of my longer barreled 7-300's (27-28"). I told him he'd probably do just as well with a 7-300wm in a 24" barrel plus he can load to the rifling in a standard mag box with 162/168gr bullets. We will shoot my same load, 73gr H-1000 with a 162 Amax in RWS brass, to compare the velocity and accuracy. I would bet he is still in the 3100fps range that he was getting from the 7STW. The bottom line is there is very little practical advantage to a 7STW or 7RUM loaded to standard mag length. If you want to add a Wyatt 4" mag box so the bullets can be seated where they need to be then both will start to run away from a 7-300wm. Mud, A 7STW at 3000fps with 180's is pretty pathetic really. A warm 7RM will do that and a 7-300wm will do well over 3100fps. As long as it shoots good leave it but I'd have a hard time being on the STW band wagon quoting velocities that low no matter what the pressure is like. There is a reason people shoot magnums and that is for speed. If I had to run a STW that slow to get a accurate load I'd sell it and build something else personally. To me that is like having a 8 second race car and running it in a 12 second class because it runs better there. [/QUOTE]
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