N320 data for cast .40 S&W

Mastiff37 · January 12, 2014, 11:53 AM

I've checked Lyman book (nothing) and VV website. VV website, only possibility is Fiocchi LTC 180g. I'd like to use some SNS casting coated bullets (this is for a factory barrel Glock). Should I be okay using the VV data on any coated cast bullet of the same weight (starting low of course)? Anyone have other sources of cast bullet data for N320? Thanks.

**Unclenick** · January 12, 2014, 12:44 PM

Swaged or cast lead and coated lead bullets should not have significantly different starting pressures. The all go into the bore relatively easily compared to a jacketed bullet. What you want to look at is matching seating depth as well as bullet weight and material to keep pressures matched.

Seating Depth = Nominal Case Length + Bullet Length - COL

January 12, 2014, 11:53 AM	#1
Mastiff37 Member Join Date: May 21, 2008 Posts: 51	N320 data for cast .40 S&W I've checked Lyman book (nothing) and VV website. VV website, only possibility is Fiocchi LTC 180g. I'd like to use some SNS casting coated bullets (this is for a factory barrel Glock). Should I be okay using the VV data on any coated cast bullet of the same weight (starting low of course)? Anyone have other sources of cast bullet data for N320? Thanks.

January 12, 2014, 12:44 PM	#2
Unclenick Staff Join Date: March 4, 2005 Location: Ohio Posts: 21,063	Swaged or cast lead and coated lead bullets should not have significantly different starting pressures. The all go into the bore relatively easily compared to a jacketed bullet. What you want to look at is matching seating depth as well as bullet weight and material to keep pressures matched. Seating Depth = Nominal Case Length + Bullet Length - COL __________________ Gunsite Orange Hat Family Member CMP Certified GSM Master Instructor NRA Certified Rifle Instructor NRA Benefactor Member and Golden Eagle