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Introduction and Range Report!
8 years 4 days ago - 8 years 4 days ago #47782
by Freqrider
Introduction and Range Report! was created by Freqrider
Greetings! I'm new to the forum and the AR platform as well. I just got a venerable, Armalite AR10Tac16 and got out today to zero it. Before even having the rifle I grabbed a set of dies and some brass and started developing a load for it! 
Using Quickload software and an Optimal Barrel Time chart I guesstimated 41.5 grains of AR Comp powder with 155gr. SMK's @ 2.775 OAL would get me close to a node at 2550 fps. with my 16" barrel. I repeat "guesstimate", since I don't have a chrono.
I started off with some 150 gn. Federal Power Shock to sight her in. First, I closed my gas block all the way and opened it 1.5 turns from 3, I believe. Shot one round at a time to see if the bolt would lock back. It did so I closed it half a turn. Still stayed open on empty mag at 1 turn. Good, I left it there. I determined from my ballistics calculations that a 44 yard zero would also zero at 100 yards so I set up my target at 44 yards and zero'd my BUIS. Not too far off! Then I attached the Nikon 3x9 BDC scope I yanked off my bolt gun using a Weaver SPR Thumbscrew mount. Well that was way off! (7" low and 7" left) a few clicks and 10 shots later I had both sight systems zeroed at 44 yards! Now for the real test. 100 yards with my reloads. Bolt didn't lock back so I opened the gas block half a turn. Four shots, three just about touching! About 1 moa high and to the left. Not bad for aiming at a piece of tape from 100 yds! Shot a few 180 gn SGKs I reloaded as well using 39gn AR Comp. No real appreciable difference in POI from the two at 100 yds. Blasted a water jug and a squash someone left there as well. This gun is gunna be boring to shoot. It hits everything I point it at!
Using Quickload software and an Optimal Barrel Time chart I guesstimated 41.5 grains of AR Comp powder with 155gr. SMK's @ 2.775 OAL would get me close to a node at 2550 fps. with my 16" barrel. I repeat "guesstimate", since I don't have a chrono.I started off with some 150 gn. Federal Power Shock to sight her in. First, I closed my gas block all the way and opened it 1.5 turns from 3, I believe. Shot one round at a time to see if the bolt would lock back. It did so I closed it half a turn. Still stayed open on empty mag at 1 turn. Good, I left it there. I determined from my ballistics calculations that a 44 yard zero would also zero at 100 yards so I set up my target at 44 yards and zero'd my BUIS. Not too far off! Then I attached the Nikon 3x9 BDC scope I yanked off my bolt gun using a Weaver SPR Thumbscrew mount. Well that was way off! (7" low and 7" left) a few clicks and 10 shots later I had both sight systems zeroed at 44 yards! Now for the real test. 100 yards with my reloads. Bolt didn't lock back so I opened the gas block half a turn. Four shots, three just about touching! About 1 moa high and to the left. Not bad for aiming at a piece of tape from 100 yds! Shot a few 180 gn SGKs I reloaded as well using 39gn AR Comp. No real appreciable difference in POI from the two at 100 yds. Blasted a water jug and a squash someone left there as well. This gun is gunna be boring to shoot. It hits everything I point it at!
Last edit: 8 years 4 days ago by Freqrider.
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8 years 3 days ago #47785
by Freqrider
Replied by Freqrider on topic Introduction and Range Report!
I have nothing to compare it to, really. Armalite calls it a compensator/flash supressor, though the reviews of the rifle claim it is not very good at doing either? But ya, itlooks cool! Thinking of sharpening it if I ever need to reach out and poke someone!
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- Libertarian623
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8 years 2 days ago #47789
by Siscowet
Replied by Siscowet on topic Introduction and Range Report!
Congrats , you have a shooter. Quickload is a good program. Just watch out for those chamber pressures.Freqrider wrote: Greetings! I'm new to the forum and the AR platform as well. I just got a venerable, Armalite AR10Tac16 and got out today to zero it. Before even having the rifle I grabbed a set of dies and some brass and started developing a load for it!
I started off with some 150 gn. Federal Power Shock to sight her in. First, I closed my gas block all the way and opened it 1.5 turns from 3, I believe. Shot one round at a time to see if the bolt would lock back. It did so I closed it half a turn. Still stayed open on empty mag at 1 turn. Good, I left it there. I determined from my ballistics calculations that a 44 yard zero would also zero at 100 yards so I set up my target at 44 yards and zero'd my BUIS. Not too far off! Then I attached the Nikon 3x9 BDC scope I yanked off my bolt gun using a Weaver SPR Thumbscrew mount. Well that was way off! (7" low and 7" left) a few clicks and 10 shots later I had both sight systems zeroed at 44 yards! Now for the real test. 100 yards with my reloads. Bolt didn't lock back so I opened the gas block half a turn. Four shots, three just about touching! About 1 moa high and to the left. Not bad for aiming at a piece of tape from 100 yds! Shot a few 180 gn SGKs I reloaded as well using 39gn AR Comp. No real appreciable difference in POI from the two at 100 yds. Blasted a water jug and a squash someone left there as well. This gun is gunna be boring to shoot. It hits everything I point it at!
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8 years 1 day ago - 8 years 1 day ago #47792
by Freqrider
Replied by Freqrider on topic Introduction and Range Report!
I make a habit of measuring bullet length, case capacity in grains of H2O, case length, and inputting these variables into QuickLoad, rather than relying on the supplied data. It's more accurate this way. Also, with my shorter length barrel, it's not possible to safely attain velocities fast enough to approach the higher accuracy nodes. My loads are well below Alliant's max. I've been reloading 300 win mag for some time now, haven't blown one up yet!
Last edit: 8 years 1 day ago by Freqrider.
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- Libertarian623
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