7mm International Rimmed
The 7mm International Rimmed was developed as a silhouette cartridge for use in the Thompson Center single shot pistol. It is based on the 30-30 Winchester case necked down to 7mm (.284"), then fire formed to create a 38 degree shoulder angle. It was developed by Elgin Gates in the late 1970s as one of a series of wildcat silhouette cartridges ranging from 25 to 35 caliber for I.H.M.S.A. matches. The 7mm International Rimmed cartridge is similar to the commercial 7-30 Waters except for the sharper shoulder and less body taper. Both are made by necking down the 30-30 Winchester case. The 7mm International Rimmed is popular among handgun silhouette shooters and is a very effective cartridge for this sport.
The 7mm (284) caliber has emerged as a popular choice for handgun silhouette shooting, and a fairly large number of 7mm cartridges have emerged for this purpose. The 7mm International Rimmed is one of the better ones and also makes a good field cartridge for anything from varmints up to deer sized game when loaded with proper bullets at top velocities. It will push the 130 grain bullet at over 2000 fps muzzle velocity out of a 10 inch barrel, and the same bullet at around 2200 fps out of the 14 inch barrel. The 7-30 Waters loaded by Federal can do as well or better, and it is a commercial cartridge requiring no neck sizing or other changes. For these reasons it may replace the 7mm International Rimmed and some of the other rimmed 7mm cartridges as a favorite handgun silhouette round.
Source: Cartridges of the World
|7mm International Rimmed Reloading Data|
|Bullet (grs.)||Powder / (grs.)||MV||ME||Source|
|120 SP||RL-7 / 27.5||2085||1160||12" barrel|
|130 SP||H-4895 / 31.0||2040||1200||12" barrel|
|139 SP||H-4895 / 30.0||1830||1040||12" barrel|
|145 SP||H-322 / 28.0||1925||1200||12" barrel|
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