![]() ![]() ![]() Looking at the tools available for trimming cases, you’ll see a diverse selection, from the simplest hand tools to motor-driven, micrometer-adjustable machines. Uniform case length equals a uniform roll crimp and that can make a big difference in pressures and velocity. This can be crucial with those cartridges destined for lever-action rifles with tubular magazines, as the bullet of one cartridge is pushed against the base of the cartridge in front of it and if that bullet isn’t properly crimped, you’ll see it move further into the case after being loaded several times. The same principle outlined above for the revolvers can be applied to the straight-walled rifle cases, as the bullets will need to be crimped in place to prevent them from either pulling out of the case mouth under recoil in the magazine or being pushed further into the case. But once you’ve got your cases trimmed to a uniform length, the roll crimp can be set to give the perfect amount of crimp to hold the projectiles with the same amount of force each time. As that die will be set in a stationary position, you can easily envision how a case that’s too short will give a very light crimp and how a case that’s too long will put an excess crimp, rolling the case mouth much too hard. That roll crimp is usually applied via a small shelf in the inside of the seating die. Revolver cases, on the other hand, definitely need to be trimmed to a uniform length, as they’ll use a roll crimp to keep the bullet firmly in place, more often than not. If I’ve used my pistol cases for a number of firings, I’ll often check the length to see if they need a quick trim. 40 S&W, 9mm Luger and their ilk to stretch to the point where the case length is too long for the chamber. While it doesn’t happen often, the potential is there to have the cases of the. In most instances regarding the auto-loading cartridges, the case mouth is used for headspacing. Case Specificsįor the pistol cases, trimming is paramount. In many instances, that length will need to be trimmed to a uniform dimension. Our cases tend to see the brass flow from the base of the case toward the mouth, lengthening the case. However, over the course of multiple firings and resizing, brass will stretch. Our cases are made of brass for the malleable qualities of that metal it’s strong enough to handle the rigors of day-to-day handling, yet soft enough to be able to be reformed. Without trimming the cases, things can go awry, and trimming your cases is an important part of keeping things as uniform as possible. For more information, go to To prevent exposure, do not alter the product by welding, grinding, etc.Bring fired cases back into spec for reloading, trimming cases can often seem like a chore. ![]() ![]() Prop 65: Warning: This product may contain steel alloyed with trace amounts of lead and other elements which are known to the State of California to cause reproductive harm and cancer. We are required to provide Prop 65 product warnings by California's Dear Leader. Press and Deluxe Quick Trim are NOT included. The Lee Precision Quick Trim Die is shown in the illustration at right, installed in a Lee Precision Breech Lock Challenger Press with the Lee Precision Deluxe Quick Trim inserted in the top of the die. No measurement or trial and error required.Holds trimmer in precise alignment with the case.When installed in a press like the Lee Precision Breech Lock Challenger press, it holds the trimmer in precise alignment with the case so no calipers, measurement or trial and error adjustment is required to precisely trim your cases. The Lee Precision 9mm Luger Quick Trim Pistol Die is used in conjunction with the Lee Precision Deluxe Quick Trim Case Trimmer or the Lee Precision Value Trim Case Trimmer. ![]()
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