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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
7mm Rem Mag or 7mm Ultra Mag???
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<blockquote data-quote="AZShooter" data-source="post: 347336" data-attributes="member: 5219"><p>I got 3100 with the 180 Berger VLD from a 7 Rem Mag but the barrel is 30" long. (68 grs of RL-25 in a 1 in 7 twist, 3 groove lilja)</p><p></p><p>Very recently I found a "like new" model 700 7 RUM in the used rack. It was an older LSS. It was produced in 1998. I also found that Rem lists two twist rates for the 7 RUM, either 1 in 9.5 or 1 in 9.25. I moly coated the bore then began shooting moly'ed 180 VLDs. I worked up to 90 grains of RL-25 with 90 grs making tiny clusters with a hint of bolt lift. I backed off to 89 grs for a velocity of 3100 fps from the 26" barrel. </p><p></p><p>Based on my experiences with three 7 RUMs you run into pressure with the 180 VLD right around 90 grs of RL-25/3100 fps with a 26" barrel.( I checked my notes) I can't imagine how anyone could get 3250 unless they had a much longer barrel, which the 7 RUM should have IMO. </p><p></p><p>Get the 7 RUM, don't worry about recoil, it isn't bad at all. The recent LSS was 8 3/4 lb after hollowing out the laminate stock and putting on a 4-12 leupold was very tolerable.</p></blockquote><p></p>
[QUOTE="AZShooter, post: 347336, member: 5219"] I got 3100 with the 180 Berger VLD from a 7 Rem Mag but the barrel is 30" long. (68 grs of RL-25 in a 1 in 7 twist, 3 groove lilja) Very recently I found a "like new" model 700 7 RUM in the used rack. It was an older LSS. It was produced in 1998. I also found that Rem lists two twist rates for the 7 RUM, either 1 in 9.5 or 1 in 9.25. I moly coated the bore then began shooting moly'ed 180 VLDs. I worked up to 90 grains of RL-25 with 90 grs making tiny clusters with a hint of bolt lift. I backed off to 89 grs for a velocity of 3100 fps from the 26" barrel. Based on my experiences with three 7 RUMs you run into pressure with the 180 VLD right around 90 grs of RL-25/3100 fps with a 26" barrel.( I checked my notes) I can't imagine how anyone could get 3250 unless they had a much longer barrel, which the 7 RUM should have IMO. Get the 7 RUM, don't worry about recoil, it isn't bad at all. The recent LSS was 8 3/4 lb after hollowing out the laminate stock and putting on a 4-12 leupold was very tolerable. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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7mm Rem Mag or 7mm Ultra Mag???
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