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Mosin &7n1 @ 863 meters

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Mosin &7n1 @ 863 meters

Postby 188mule » Tue Apr 15, 2014 11:17 am

Type in tiborasaurusrex or m91 mosin nagant &7n1 @ 944yards into youtube. Maybe someone could link it I have no idea how to. Thanks
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Re: Mosin &7n1 @ 863 meters

Postby Grimstod » Tue Apr 15, 2014 12:36 pm

Watch on youtube.com
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Re: Mosin &7n1 @ 863 meters

Postby Grimstod » Tue Apr 15, 2014 1:07 pm

This is a very awesome video. 3 out of 5 shots at 863meters is just incredible. Goes to show that you don't need to modify to shoot well. Just good bullets will fix 90% of your problems.
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Re: Mosin &7n1 @ 863 meters

Postby ShootnMathews » Tue Apr 15, 2014 1:10 pm

Guess that kinda kicks the " mosins only shoot heavy bullets well" theory.
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Re: Mosin &7n1 @ 863 meters

Postby Grimstod » Tue Apr 15, 2014 1:22 pm

Keep in mind that the 7n1 is 1.279" long. That is as long as 185gr sierra match king and about same BC. Mosins like longer bullets. Lead and copper jacketed bullets are denser then steel. Thus a 152gr bullet can have same shape and size as a 185gr but it will be lighter and thus faster too. The 7n1 will stay supersonic out to 1400yards when shot from a uncut mosin.
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Re: Mosin &7n1 @ 863 meters

Postby kermit » Tue Apr 15, 2014 1:51 pm

Grimstod wrote:Keep in mind that the 7n1 is 1.279" long. That is as long as 185gr sierra match king and about same BC. Mosins like longer bullets. Lead and copper jacketed bullets are denser then steel. Thus a 152gr bullet can have same shape and size as a 185gr but it will be lighter and thus faster too. The 7n1 will stay supersonic out to 1400yards when shot from a uncut mosin.

nice shooting.
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Re: Mosin &7n1 @ 863 meters

Postby 188mule » Tue Apr 15, 2014 3:42 pm

Grimstod wrote:Keep in mind that the 7n1 is 1.279" long. That is as long as 185gr sierra match king and about same BC. Mosins like longer bullets. Lead and copper jacketed bullets are denser then steel. Thus a 152gr bullet can have same shape and size as a 185gr but it will be lighter and thus faster too. The 7n1 will stay supersonic out to 1400yards when shot from a uncut mosin.

Thanks for putting that up. Thought the forum would like to see it. Before 7n1 got crazy expensive I pulled a bunch of rounds apart to weigh the charges and bullets to compare with the standard stuff and found that it was very consistant in powder weight and bullet weight. I got curiuos because the cheaper stuff shot like crap in my romanian fpk but the 7n1 shot 3/4".
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Re: Mosin &7n1 @ 863 meters

Postby ShootnMathews » Tue Apr 15, 2014 6:20 pm

Grimstod wrote:Keep in mind that the 7n1 is 1.279" long. That is as long as 185gr sierra match king and about same BC. Mosins like longer bullets. Lead and copper jacketed bullets are denser then steel. Thus a 152gr bullet can have same shape and size as a 185gr but it will be lighter and thus faster too. The 7n1 will stay supersonic out to 1400yards when shot from a uncut mosin.

Sierra doesn't list lengths for their bullets because the length is "a secret key number" according the the guy I usually talk to. When I do my "shooter" inputs to calculate spin drift for Sierra bullets I have to call them to get a length. But Berger list their lengths. In a 308 the 7N1 bullet is longer than a 168 grain but shorter than a 175 grain. A berger 155 grain is 1.256". Not sure where it compares to a smk at since I don't have any other than the 174 which is 1.23" according to Sierra. So the 7N1 is actually only .05" longer than the smk. The 7n1 bullet must not have as much steel in it as the 147 grain steel core.
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Re: Mosin &7n1 @ 863 meters

Postby Shepard » Tue Apr 15, 2014 9:12 pm

7n1 is not copper and lead but copper steel and lead. It was developed in 1966.

  To increase accuracy for the Dragunov SVD, the Soviets developed the 7N1 variant of the cartridge in 1966. The 7N1 was developed by V. M. Sabelnikov, P. P. Sazonov and V. M. Dvorianinov. It used match-grade extruded powder instead of the coarser ball propellant and had a 9.8 g (151.2 gr) boat-tailed FMJ jacketed projectile with an air pocket, a steel core and a lead knocker in the base for maximum terminal effect. Produced by “Factory 188” (Novosibirsk Low Voltage Equipment Plant), cartridges are only head-stamped with the number “188” and the year of manufacture. It came packaged 20 loose rounds to a paper packet, 22 packets to a metal “spam” tin, and two tins per wooden case for a total of 880 rounds. The individual paper packets, hermetically sealed metal 'spam' cans, and wooden shipping crates were all distinctly marked Snaiperskie ("Sniper") in Cyrillic. Even the wax wrapping paper for the paper boxes was covered in red text to make sure it wasn't misused.  


One other reason for increased accuracy is the bullet diameter is .312
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Re: Mosin &7n1 @ 863 meters

Postby sidewayskid » Wed Apr 16, 2014 4:18 pm

Does anyone have thoughts or info on how "Bulgarian 10" compares the 7N1? Nice shooting.
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