Tools & Resources. Most Men Don't Need PSA Tests, Doctors' Group Says. MONDAY, April 8 (HealthDay News) -- Men have long been encouraged to get prostate cancer screenings, but there's insufficient evidence that the benefits of a PSA test outweigh the substantial risks associated with the screening.
There are two types of crimp used when reloading handgun cartridges: the roll crimp and the taper crimp. Roll Crimping. With a roll crimp, the diameter at the very end of the case mouth is reduced, and rolled inward toward the bullet, leaving a slight radius at the top of the case.
Q: What is the difference between taper, plug and bottom taps? A: Taper taps are often called starting taps because they have more chamfered threads. Chamfer is the angled portion at the front of the tap which helps it start threading. Taper taps have 7 to 10 threads of chamfer. Plug taps have 3-5 threads of chamfer, bottoming taps have 1-1-1/2 threads of chamfer. Q: What is the difference between spiral point taps and hand taps?