Ammunition & Hand Loading > Cartridge and Shotshell reloading
I am finally handloading .223
JimP:
"#2). Mr. Corbin, Dave (swage.com or corbins.com or ) has his book "Rediscover Swaging #" on his web site for reading, download, etc. He expresses the opinion that with calibers as small as .22 and .24 the boat tail has no appreciable effect. Wasted effort/money for civilian uses."
Entirely plausible- just look at ballistic coefficients for light (say 55 grain .223) bullets..... BTSP and SP of the same weight: little difference. Then look at the BC's for 150 grain .277's, both BTSP and Spire point: big dofference past 400 yards in velocity/trajecory/energy. Fairly simply to verify- Shoot them.
Dan W:
New chronograph arrived today. Very basic model from Competition Electronics
http://www.competitionelectronics.com/pages/Prochrono_Pal.html
Dan W:
After working the Cabela's membership drive today, I picked up some 50gr VMAX and 55 fmjbt Hornady bullets for more experimentation...
Dan W:
Today I had a couple hours on the range checking out the new chronograph. I was pretty happy with the 50gr VMAX load, as it it nearly identical in accuracy to the 55gr VMAX w/cannelure with a slight edge to the 55gr bullet.
Load data
50gr VMAX, 2.260" COL, 24.5gr H335, average velocity 2919fps Magtech SR primer TW73 brass
50gr VMAX, 2.222" COL, 24.5gr H335, average velocity 2900fps Magtech SR primer TW73 brass
55gr VMAX, 2.245" COL, 24.2gr H335, average velocity 2850fps Magtech SR primer TW73 brass.
It's pretty obvious from the data that I am on the low side all around for velocity. Next time out I will add .5gr powder to the 50gr load and bump the 55gr up to 24.5gr. I may also try COL of 2.260"(max for magazine use). As I understand it, that will increase both pressure and velocity, and I think I have some room to work in both areas.
Accuracy for all these loads is a consistent 1 MOA, results mostly due to operator inconsistency.
But I can feel my technique starting to smooth out each time I shoot. Maybe I'm not all that far from hitting pdogs at 200 yards
JimP:
I have had good results with the 110gr .277 VMAX...... good bullets, though they print consistently 2 inches left of my hunting load's(150gr SIE GK) zero........
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