Pretty interesting; some of us are looking for the data provided. I'm hoping that Tools and Targets (for example) will do tests on expansion/retention of popular JHP loads using the Jelly Contraption. Particularly the 115gr. Critical Defense.
Posts: 3460 | Location: Fairfax Co. VA | Registered: August 03, 2015
Originally posted by rat2306: Pretty interesting; some of us are looking for the data provided. I'm hoping that Tools and Targets (for example) will do tests on expansion/retention of popular JHP loads using the Jelly Contraption. Particularly the 115gr. Critical Defense.
Lucky Gunner has a short video here comparing 124 grain Gold Dots to 124 and 147 grain HSTs. He tests both the standard velocities and +P versions thru several barrel lengths, including gel tests. The video is about 5 years old, I keep hoping they will do an updated version testing more ammo types.
I skimmed the tnoutdoors video yesterday; there is a lot of info there, I need to go back and really watch it to process all of it.
"I, however, place economy among the first and most important republican virtues, and public debt as the greatest of the dangers to be feared." Thomas Jefferson
Posts: 1552 | Location: Hartford, AL | Registered: April 05, 2007
Good video. In the limited 9mm chronograph testing I've done, I've found that powder choice makes a lot of difference. Quality factory defensive ammo like Federal HST uses powders that are optimized for pistol barrels and you don't see much gain out of the rifle. 147gr HST does 936 fps out of my EMP4 while only making 950 fps out of the carbine.
In contrast, a slower powder like HS-6 takes longer to burn and will see almost 200 fps improvement with the longer barrel. I get 1103 fps out of a 3.7" barrel and 1322 fps out of the 16'carbine with a 124gr powder coated bullet. The improvements aren't quite what you'd get with magnum cartridges but 200+fps is still pretty significant.
Posts: 9452 | Location: In the Cornfields | Registered: May 25, 2006
