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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Want to shoot 7mm Berger 180gr @ 2900 fps
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<blockquote data-quote="a.JR" data-source="post: 28754" data-attributes="member: 1391"><p>MontanaMarine,Have experimented with 8 wildcats for the 162 to 180gn 7mm bullets.Tried 7mm rem mag AI& then shortened it buy 100 thou,then 250 thou then 500 thou,as well as a7mm/6.5 rem mag imp and a 7/300 wsm and then a very slightly improved 284w.I am going now to a 280 AI with RWS brass very shortly.Good brass is the key and the cartridges you mentioned suffer in this area.Cut a long story short the cartridge with the lightest charge that you can pull the trigger on 5 times at least and still be able to use the brass as well as get your magic 2900 fps is the 280 AI(use the RWS stuff).This round forms easily and if you do the right things before you pull the trigger the first time the case should be competition ready at the second firing.We make our own reamers so it's easy to experiment,i have had a drawing of a cartridge i did about 3 years ago that i will test at the same time as the 280AI in a different rifle,it's based on a 9.3x 64 necked to 7mm(.309dia),shortened to 60 mm with a 35 deg shoulder.I don't think there will be much between the 2 except a lot of work..Jr..Jeff Rogers</p></blockquote><p></p>
[QUOTE="a.JR, post: 28754, member: 1391"] MontanaMarine,Have experimented with 8 wildcats for the 162 to 180gn 7mm bullets.Tried 7mm rem mag AI& then shortened it buy 100 thou,then 250 thou then 500 thou,as well as a7mm/6.5 rem mag imp and a 7/300 wsm and then a very slightly improved 284w.I am going now to a 280 AI with RWS brass very shortly.Good brass is the key and the cartridges you mentioned suffer in this area.Cut a long story short the cartridge with the lightest charge that you can pull the trigger on 5 times at least and still be able to use the brass as well as get your magic 2900 fps is the 280 AI(use the RWS stuff).This round forms easily and if you do the right things before you pull the trigger the first time the case should be competition ready at the second firing.We make our own reamers so it's easy to experiment,i have had a drawing of a cartridge i did about 3 years ago that i will test at the same time as the 280AI in a different rifle,it's based on a 9.3x 64 necked to 7mm(.309dia),shortened to 60 mm with a 35 deg shoulder.I don't think there will be much between the 2 except a lot of work..Jr..Jeff Rogers [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Want to shoot 7mm Berger 180gr @ 2900 fps
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