Finnish Magic for .45 ACP Pistols — Vihtavuori N320
Man does not live by long-guns alone. We know that many of our readers own .45 ACP handguns and load for this extremely accurate “classic” cartridge. When selecting a powder for the .45 ACP, there are many good options. All the major powder manufacturers make propellants with appropriate density and burn rate characteristics for the .45 ACP. Popular powder choices include: AA #5 (Accurate Powder); Bullseye (Alliant); Clays, HP-38, and Titegroup (Hodgdon); VV N310, N320, N340 (Vihtavuori); and WW 231 and WST (Winchester). We’ve tried these powders in a variety of .45 ACP handguns. When we consider the factors that make for a good pistol powder, we think N320 is one of the best available propellants for the .45 ACP. Vihtavuori N320 is very accurate, it meters well, and it burns clean, with minimal smoke and flash. If you haven’t tried VV N320 yet, you should.
Pros/Cons of Different Powders for .45 ACP
This Editor has personally tried out eight or more different powders for the .45 ACP. Bullseye works but it is very dirty (both smoke out the barrel and sooty powder fouling on case). Though it otherwise burns clean, Titegroup leaves a singular (and nasty) high-temp flame streak on your brass that is hard to remove. AA #5 is a good choice for progressive press newbies as you use more powder so a double charge will (usually) be obvious. I like AA #5 but N320 was more accurate. Clays burns clean but some powder measures struggle with flake powders like this. WW 231 offered excellent accuracy and metered well, but it kicked out sparks with little pieces of debris that would hit me in the face. Who wants that?
I personally tried all the powders listed above with lead, plated, and jacketed bullets. After testing for accuracy, consistency, and ease of metering, I selected VV N320 as the best overall performer.
Vihtavuori N320
- No powder tested was more accurate (WW 231 was equally accurate).
- Meters very well in all kinds of powder measures.
- Produces very little smoke from muzzle.
- Does not put nasty burn streak on brass like Tite-Group does.
- Low Flash — you don’t get particles and sparks flying out like WW 231.
- Cases come out from gun very clean — so you can tumble less often.
Forum member and gunsmith Michael Ezell agrees that N320 is a good choice for the .45 ACP. Mike has also found that WW 231, while accurate, produces sparks and a large flash. Mike writes: “I first started using N320 after my first night shoot, while shooting IDPA/IPSC matches. It was astonishing how much of a fireball the WW 231 created. I was literally blinded by the flash while trying to shoot a match. As you can imagine, that didn’t work out very well. I went from WW 231 to N320 and never looked back…and the flash from it was a fraction of what a kid’s sparkler would give off. I have nothing but good things to say about [N320] after using both. Night shoots are a real eye-opener! When it comes to a personal protection… there is, statistically, a very high chance that if you ever have to use a gun to protect yourself or your family, it’ll be in the darkness[.] Being blinded by muzzle flash (and deafened by the noise) are things that should be considered, IMO.”
This Editor owns a full-size, all-stainless S&W 1911. After trying numerous powders, I found VV N320 delivered the best combination of accuracy, easy metering, consistency, clean burning qualities, and low muzzle flash. My gun has proven exceptionally accurate using N320 with bullets from 180 grains to 230 grains — it will shoot as accurately as some expensive customs I’ve tried. At right is 5-round group I shot offhand at 10 yards with my 5″ S&W 1911. The bullet hole edges are sharp because I was using semi-wad-cutters. Rounds were loaded with Vihtavuori N320 and 200-grain SWCs from Precision Bullets in Texas.
@ double the cost of Bullseye or WW 231 !!
Editor: It’s pricier, but the difference is not what you say. We are finding VV N320 at $32.00 per pound vs. $19.50 per pound for WW 231. That’s about 64% more, not double.
Problem I had with N320 loading USPSA Major PF in my 5″ 1911, it was at the top end of the range. If I wanted a little more PF for room, I would be too hot according to their load data. WST and W231 are much better for 45 USPSA major loads. If you can find it.
During the powder shortage, I had to use VV 340 instead of VV320. VV340 is a little slower but it works very well. I can make major with 200 RS Berry bullets with no problem. As the Editor says, it burns cleanly and doesn’t leave residue every where.
They are both the very best to use in your .45 ACP!