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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Kids rifle build suggestions
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<blockquote data-quote="StumpGrinder" data-source="post: 2020051" data-attributes="member: 114832"><p>I am a big fan of the 7.62x39 which is the parent cartridge of the grendel I believe. This round has gotten a bad rap for being inaccurate but it is the am platform that is in accurate. The ska is slightly better but very heavy. My AR Stoner upper on my M&P 15 shoots pretty good; PPU, Brown Bear, Wolf, and TulAmmo 122-123 gr shoot sub moa, Barnes 123, wolf 125 and TulAmmo 154 gr shot moa. This upper didn't like the Barnaul ammo, 3" group. It was the largest dia. Bullet at .311. The others were .308-.310. My understanding is that American made barrels are .308 and overseas barrels are .310-.312. People say the 300 Black out is better because of bullet selection however if the Ruger American and the AR uppers are .308, they have the same bullet selection. And 7.62x 39 ammo is cheaper! Plus this round is usually chambered in short barrels that don't show its full potential. The difference between a 16" barrel and a 23" barrel is around 100 fps. That may not sound like a lot but for this round it adds at least 50 yds to its terminal performance. Some say it's close to the 30-30 which has taken more deer on this continent than any other. But in reality past 100 yards, with bullets of 100-150 grains it surpasses the 30-30 in trajectory and energy. Here is the math: 125 grain 2600fps bc15</p><p>30-30 100 yds 200 yds 300 yds 400</p><p> +8.7. +10.8. 0.0. -31.4</p><p> 1,223ft# 765ft# 473ft# 311ft#</p><p>7,62. +8.4. +9.7. 0.0. -24.3</p><p>130gr 1,187ft# 911ft# 693ft# 527ft#</p><p>2300fps bc 30</p><p>30-30. +10.8. +13.1. 0.0. -36.2</p><p>150gr 1,178ft# 765ft# 502ft# 365ft#</p><p>2300fps. bc 19</p><p>7.62. +9.8. +11.1. 0.0. -26.9</p><p>150gr. 1,175ft# 932ft# 737ft# 584ft#</p><p>2100fps bc 34 </p><p>Now I do not recommend zeroing this round at 300yds, my Howa mini has a 22" barrel and it is zeroed at 200 which puts it 4.5" high at 100yds and about that low at 250-275 yds. These velocities were taken from 16" barrels so I can expect about 100 fps more from the Howa. The flex tip bullets have helped the 30-30 but even they only have a bc of</p><p>7.62x39 Howa mini, 22" barrel gives you 100 fps over 16" velocity test barrels. It is a .311 caliber barrel so will shoot all ak ammo safely. American made barrels are .308 just like the Black Out therefore will shoot all the same bullets as are available for the 300 Black Out. 7.62x39 is equall to the 30-30 in 100-150 grain bullets at 100yds and beyond that beats it soundly. The flex tip bullets have improved the 30-30 and it can handle heavier bullets because of case capacities. But under 300yds with Barnes 123 tsx the 7.62x39 hammers deer but DOESN'T hammer your shoulder or your wallet. And buy the way Spitzer shaped fmj rifle bullets are great for hunting! They tumble when they hit creating almost as much truma as hollow points without having to pick shrapnel out of the meat!!! Pistol fmj bullets do just fly straight through unless designed to tumble like Fort Scott Munitions. Watch YouTube videos of fmj bullets in ballistic gel. They ALL TUMBLE with in a couple of inches of impact. I took a deer last year broad side through the rib cage with my M&P 15, 62 grain fmj. Exit wound was .75" and the deer only went 50 yds!!! A friend I was hunting with shot one the same size with 300 wm ballistic tip and it ran further!!</p></blockquote><p></p>
[QUOTE="StumpGrinder, post: 2020051, member: 114832"] I am a big fan of the 7.62x39 which is the parent cartridge of the grendel I believe. This round has gotten a bad rap for being inaccurate but it is the am platform that is in accurate. The ska is slightly better but very heavy. My AR Stoner upper on my M&P 15 shoots pretty good; PPU, Brown Bear, Wolf, and TulAmmo 122-123 gr shoot sub moa, Barnes 123, wolf 125 and TulAmmo 154 gr shot moa. This upper didn't like the Barnaul ammo, 3" group. It was the largest dia. Bullet at .311. The others were .308-.310. My understanding is that American made barrels are .308 and overseas barrels are .310-.312. People say the 300 Black out is better because of bullet selection however if the Ruger American and the AR uppers are .308, they have the same bullet selection. And 7.62x 39 ammo is cheaper! Plus this round is usually chambered in short barrels that don't show its full potential. The difference between a 16" barrel and a 23" barrel is around 100 fps. That may not sound like a lot but for this round it adds at least 50 yds to its terminal performance. Some say it's close to the 30-30 which has taken more deer on this continent than any other. But in reality past 100 yards, with bullets of 100-150 grains it surpasses the 30-30 in trajectory and energy. Here is the math: 125 grain 2600fps bc15 30-30 100 yds 200 yds 300 yds 400 +8.7. +10.8. 0.0. -31.4 1,223ft# 765ft# 473ft# 311ft# 7,62. +8.4. +9.7. 0.0. -24.3 130gr 1,187ft# 911ft# 693ft# 527ft# 2300fps bc 30 30-30. +10.8. +13.1. 0.0. -36.2 150gr 1,178ft# 765ft# 502ft# 365ft# 2300fps. bc 19 7.62. +9.8. +11.1. 0.0. -26.9 150gr. 1,175ft# 932ft# 737ft# 584ft# 2100fps bc 34 Now I do not recommend zeroing this round at 300yds, my Howa mini has a 22" barrel and it is zeroed at 200 which puts it 4.5" high at 100yds and about that low at 250-275 yds. These velocities were taken from 16" barrels so I can expect about 100 fps more from the Howa. The flex tip bullets have helped the 30-30 but even they only have a bc of 7.62x39 Howa mini, 22" barrel gives you 100 fps over 16" velocity test barrels. It is a .311 caliber barrel so will shoot all ak ammo safely. American made barrels are .308 just like the Black Out therefore will shoot all the same bullets as are available for the 300 Black Out. 7.62x39 is equall to the 30-30 in 100-150 grain bullets at 100yds and beyond that beats it soundly. The flex tip bullets have improved the 30-30 and it can handle heavier bullets because of case capacities. But under 300yds with Barnes 123 tsx the 7.62x39 hammers deer but DOESN'T hammer your shoulder or your wallet. And buy the way Spitzer shaped fmj rifle bullets are great for hunting! They tumble when they hit creating almost as much truma as hollow points without having to pick shrapnel out of the meat!!! Pistol fmj bullets do just fly straight through unless designed to tumble like Fort Scott Munitions. Watch YouTube videos of fmj bullets in ballistic gel. They ALL TUMBLE with in a couple of inches of impact. I took a deer last year broad side through the rib cage with my M&P 15, 62 grain fmj. Exit wound was .75" and the deer only went 50 yds!!! A friend I was hunting with shot one the same size with 300 wm ballistic tip and it ran further!! [/QUOTE]
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