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n320 and a 200g FMJ


jtrump

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not much info on here, only one post....

Curious if anyone could provide me with a little data for loading this.

Loading to 1.180 OAL

using a D&J 200g FMJ

Just looking at what others made in 5 inch guns to get to major so I have a starting and an "i think i should be good here point"

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Vihtavouri recommends the following.

Bullet Powder Starting load Maximum load
Weight Type/Name Mfg C.O.L.Type Weight Velocity Weight Velocity
200 FMJ/FP Hornady 31,9 1.256 N340 4.6 876 - Max: 5.3 945
3N37 5.4 955 - Max: 6.3 1014
N350 4.7 932 - Max: 5.8 989
N105 7.3 1066 - Max: 8.2 1111

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I'm looking for 180g long loaded data, which they do not publish... Basically someone else running n320 and a 180 xtreme bullet loaded long.

Edited by jtrump
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I loaded some 200gr SNS coated bullets with 3.9gr of Ramshot Competition thinking it might be a little light. Chrono showed 173.4 power factor out of my STI Trojan. Needless to say the 4.0gr and 4.1gr were a little hot. Guess I will try 3.8gr and still be on the safe side. Was using VV320 at 4.1gr and getting about 166-167 power factor. Competition is a lot cheaper too.

Bshooter

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  • 2 weeks later...

While I don't have any info for 1.180 OAL, I do have some info from a load I just completed.

My Setup and Load:

5" STI

1.144 OAL

4.1 GR N320

200 GR TNT (More on this later)

To reach 165 PF you need a minimum muzzle velocity of 825. I know most won't need this, but just for reference to get your PF the equation is (Bullet Weight X Muzzle Velocity)/1000 = PF.

When chronoing, I did 2 separate rounds of 9 shots each.

ROUND 1:

869 - 173.8

877 - 175.5

871 - 174.2

871 - 174.2

859 - 171.8

864 - 172.8

865 - 173

876 - 175.2

870 - 174

In the first round there was a FPS average of 869.11 and a PF average of 173.82

ROUND 2:

867 - 173.4

874 - 174.8

857 - 171.4

886 - 177.2

862 - 172.4

864 - 172.8

868 - 173.6

857 - 171.4

879 - 175.8

In the second round there was a FPS average of 868.22 and a PF average of 173.64

So I can reduce the powder load to 4.0 or maybe even 3.9 but as of now I'm very comfortable with the load. It shoots very flat and there is virtually no recoil/fireballs/anything wonky (scientific term there). In regards to the bullets I'm using, I was using 180 GR bayous before and met a local fellow a while back who makes these 200's. This test run was from a sample pack that he sent me and needless to say I'm very impressed with the quality of the bullets!! Consistent sizing and the coating is great! They also punch a nice hole [emoji4] I know he's on the forums, so I'll have to direct him to this post as he has some load info for 200gr bullets as well.

Hope this helps!!

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So I can reduce the powder load to 4.0 or maybe even 3.9 but as of now I'm very comfortable with the load. It shoots very flat and there is virtually no recoil/fireballs/anything wonky (scientific term there). In regards to the bullets I'm using, I was using 180 GR bayous before and met a local fellow a while back who makes these 200's. This test run was from a sample pack that he sent me and needless to say I'm very impressed with the quality of the bullets!! Consistent sizing and the coating is great! They also punch a nice hole [emoji4] I know he's on the forums, so I'll have to direct him to this post as he has some load info for 200gr bullets as well.

Hope this helps!!

Thanks for the kind words. I'm going to try and become a forum dealer here shortly.

BTW I'm using 4.3gr of 320 @ 1.17 and getting about 169 PF. Its been awhile since I've checked it though. I need to before I start loading for the season.

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  • 1 month later...

I'm looking for 180g long loaded data, which they do not publish... Basically someone else running n320 and a 180 xtreme bullet loaded long.

Not every bbl runs the same speed.

I had 2, 5" Trojans that shot 30 fps different

That said, I would start with 4.8 grains of 320 behind a 180 grain, chrono, and adjust as needed.

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