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N320 40 S&W Load Recipes

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Looking for some recommendations...just had Jeff Abernathy build me a pretty new 40 SS and I have piles of N320 laying around.  Trying to decide on 180 grain or 200 grain, and get a couple of recipe options...thoughts?

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There is a ton of info. In the reloading section for .40 & N320.  You will need to have an idea of what length you can load out to (probably ~ 1.18") before you can get an idea of how many gr. to start with.  Planning on coated or JHP??  With a 180gr coated bullet you will probably be @ 4.9gr @ 1.18" to make ~170 pf.

Edited by NoSteel

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Para P16.40 5" barrel. I load 4.7 gr N320 @1.20 with Blue Bullets 180 RNFP. That puts me right at 171 pf and that also seemed to be the most accurate load. Temp was 72 that day. 

 

I know a guy running an STI with the same bullets and he loads 4.6 gr N320 @1.18 

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5.3gr.. Of N320 1.20 OAL 

FMJ bullets out of my svi 5.4 sight tracker 

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Just loaded up some new SNS Casting 180gr Round Nose, non grooved, with 4.6gr N320 @ 1.180" from a 5" STI Edge. 

 

Made 169.0 pf

 

Really smooth shooting and has been very accurate in my Edges. 

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I use 4.5 grains of N320 under a 180 coated Eggleston, and 4.9 grains of N320 under Rainer plated. OAL 1.145"

Makes 170-173 PF from my 1911 & my CZ TS.

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3,6 grains under a 220 coated ares bullet at 1.135... PF 172, super soft shooting out of my Limited Custom Tanfoglio

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5.1 N320 with a extreme 180 gr RNFP @1.18 gives me 169-170 PF out of my SVI 5" . I drop .1 gr  N320 for my STI barreled guns to achieve the same PF .

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4.2 of N320 for a 200 SNS RN with groove at 1.200  gives me a 167 PF out of my Para Sight Tracker (Infinity barrel) with almost straight crimp with an undersize sizing die

 

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On 3/30/2018 at 2:12 PM, JayDee said:

I use 4.5 grains of N320 under a 180 coated Eggleston, and 4.9 grains of N320 under Rainer plated. OAL 1.145"

Makes 170-173 PF from my 1911 & my CZ TS.

 

Same 4.5gr Eggleston’s or Blue’s 180’s and 4.9gr for Berry’s.  OAL 1.135” for CZ CTS.  

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5.2 N320

range brass Bulge Busted

CCI pistol primers

180 Precision Delta RN

1.2coal

167pf out of my 5 inch Infinty

 

 

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I use 4.9 of N320, 180 Zero JHP, 1.180 OAL, out of my 5'' 2011. It made 169 PF. This was with different headstamp brass. 

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I use 4.7 of N320, 180 Blur Bullets, 1.182 OAL, out of my 5'' 2011. It made 170.5 PF. This was with different headstamped brass.

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4.1 grains of N320 under a 200 grain blue seated to 1.145” with either a cci or s&b primer out of a 5” sti gives me low 170’s pf consistently. Mixed headstamps. 

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4.9 grains N320, 180 TCFM Zero bullet, 1.185" OAL, various brass, Federal primer.  Makes 171 power factor out of Atlas 1911 or STI 2011.  By the way, what do you crimp to?  I've crimping to 0.423 - 0.424".  It's been suggested that I crimp tighter to avoid the possibility of setback during feeding and subsequent high pressure.

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For 5.4" SVI

1.196 OAL

180 grain coated lead

4.8 grains for N320

170PF at last match chrono.

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What barrel?  My Nowlin and Kart are faster than either of my Schuemann barrels.

 

Taran and I did a side by side test. He was working up a load for Nationals.  Nowlin and Kart were about 15-20 fps faster than his Schuemann.

 

Shorter the OAL the less powder needed in my barrel.  

 

With a 200 gr Zero and can make major at 166-167 with 4.5 VV320, in the SW.

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4.8gr N320

BBI 180gr

Fiocchi primers 

mixed range brass 

1.155 OAL

 

Makes 170pf out of my XDM 5.25s

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On 7/24/2018 at 12:37 AM, B585 said:

I use 4.7 of N320, 180 Blur Bullets, 1.182 OAL, out of my 5'' 2011. It made 170.5 PF. This was with different headstamped brass.

Since I seem to be an outlier in terms of only using 4.7 at 1.182 to make Major PF, I will note the following:

The PF was determined at a Sectional match.  A couple guys in my squad thought the Chrono was reading slow while others said they thought it was dead on.  It was almost 90 degrees when I chronoed.  I am using Winchester primers.  Those numbers were obtained through a STI barrel.  My personal chrono tends to read very close between both my 2011s and the other has a SV Ultramatch barrel.  For Majors, I determine the charge by averaging the weight of 5 charges.  The initial weight is measured on a manual scale and then every 100th bullet is checked with a digital scale.  If I need to make a change, I make it averaging 5 charges on the manual scale.  I check the length with a mic on every single bullet and only accept 1.179 to 1.186.  Again, I was shooting 180 GN Blue Bullets.  Yes, my process is surely overkill but since this was my first Major, I wanted to make sure that any mistakes I made during the match were my fault and not my equipment or ammo.

 I am not sure why I am getting away with less powder.

Edited by B585

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Since I seem to be an outlier in terms of only using 4.7 at 1.182 to make Major PF, I will note the following:
The PF was determined at a Sectional match.  A couple guys in my squad thought the Chrono was reading slow while others said they thought it was dead on.  It was almost 90 degrees when I chronoed.  I am using Winchester primers.  Those numbers were obtained through a STI barrel.  My personal chrono tends to read very close between both my 2011s and the other has a SV Ultramatch barrel.  For Majors, I determine the charge by averaging the weight of 5 charges.  The initial weight is measured on a manual scale and then every 100th bullet is checked with a digital scale.  If I need to make a change, I make it averaging 5 charges on the manual scale.  I check the length with a mic on every single bullet and only accept 1.179 to 1.186.  Again, I was shooting 180 GN Blue Bullets.  Yes, my process is surely overkill but since this was my first Major, I wanted to make sure that any mistakes I made during the match were my fault and not my equipment or ammo.
 I am not sure why I am getting away with less powder.


4.675 gn VVN320
180 gn RNFP Blue Bullets
at ~1.185" coal
Mixed range brass
CCI spp
169 pf
5.4" SV AET

Tested multiple times between ~55-90 f using 3 different chrono brands -- variance is ~+2/-1 for average pf.

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4.7 N320

180 gr Gallant truncated cone

CCI SPP

1.185" OAL

Mixed range brass

171pf

Atlas Nemesis

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