Recent content by ns66

thanks all

plan to tour blue ridge parkway, on the NC side, will it be legal to have an ar-15 in box unloaded in the trunk? legal on camp sites and visitor centers/stores parking lot? is it legal if ventured into virginia side? thanks!

actually in terms of maximizing the use of limited energy, heavier bullet wastes more, because when the bullet hits the target, the momentum has to be conserved as well (just like when it leaves the muzzle), so there's always some "pushing" and moving of the target+bullet, that's energy wasted...

about phase separation, certainly not terminal ballistics lol folks, it's hard for me to go through every point, some arguments go without looking at the conditional phrase i put in there, i never claim i am gun or terminal ballistics expert, but the physics is quite simple actually, the goal...

i know how to calculate kinetic energy (i have advance degree in physics btw, ph.d actually), your formular is just with unit conversion included, also kinetic energy of the bullet is ALL of it, all of the energy there is to do the destruction, by physics law of conservation of energy, it will...

just did some calculation about kinetic energy: kinetic energy=1/2*m*velocity^2 (ignore unit, just for comparsion) 9mm: 1/2*115*1155^2=76,700,000 (Winchester FMJ) .45acp: 1/2*230*835^2=80,180,000 (Remington FMJ) 5.7mm: 1/2*31*2130^2=70,300,000 (SS190) not much difference i'd say...

i really don't get this, the BG breaks your door, you hear it, you grab your 9mm, he sees you, life and death, he hides behind door/table/shelf/fridge/... and starts firing, you shoot back, but, the round 9mm can't penetrate as well as 5.7, may skid off all kinds of angled surface, don't you...

i 2nd that, i hope there are more companies giving us 5.7 option, more option is always a good thing

well don't put your words in my mouth, thank you i just think pointy 5.7 is better than round 9 :D

everything equal i'd think pointed is much better than round nosed

i don't know why people think penetrating body armor as not practical for civilian, BG is not going to stand there naked let you shoot him like gelatin, he will take cover hide behind everyting he can find and wear thick cloth or even body armor, AP is a good thing, round nose is a bad thing, imo

well, people believe in whatever they choose to believe, i for one believe NATO chose (almost) 5.7mm as replacement for 9mm for a good reason

P90 muzzle speed 2350 ft/s FiveSeven muzzle speed 2050 ft/s not too much difference, i provided the link or you can google

i already provided the link, under "Ammunition selection for self-defense, military, and law enforcement", quote: "A number of law enforcement and military agencies have adopted the 5.7x28mm cartridge, which is reputed to cause considerable hydrostatic shock.[62][74] These agencies include...

5.7mm from fiveseven can reach 2000f/s+ http://en.wikipedia.org/wiki/FN_Five-seven that's not as fast as rifle, but way faster (close to double) 9mm and cause considerable hydrostatic shock: http://en.wikipedia.org/wiki/Hydrostatic_shock