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AR15 magazine recommendations

Are you legally bound to 10? I've seen things get weird with 8,9, 10 rounders due to the shorter spring and follower situation. I don't go lower than 20 if I don't have to.

If I'm shooting for groups, I always roll with a newer Gen 3 PMag. Colt/NHMTG/OKAY/Surefeed are my go to for non polymer.
The problem with most AR mags is folks keep em in use WAAAY to damn long. The beauty of a PMAG is their failure point...unlike the others where lip spread can be way too much, causing problems and you don't know it.

Have i changed a single mind? Pi**a G@te IS real!

If this is not disgusting beyond words...

Fucking world bank... as bad as USAID for loading up the leftist coffers. Abusing 7 and 8 year old girls and boys... Hope he never sees his home country again... Raped to Death in federal Pen would be most excellent.


Sirhr

AR15 magazine recommendations

I am interested in trying some 10 round magazines from manufacturers other than Magpul. They'll be running in Compass Lake lowers, if that makes any difference. Have had some trouble with Pmags recently (irregular feed lips) and would like to see what other options experienced shooters consider reliable. Metal, polymer, or mix, I have no biases about who makes them or how.

Appreciate any suggestions.
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6.5 Creedmoor

Hoping this helps someone for heavy bullets, there is some info out there but not a lot on the Berger 156 gr EOL in 6.5 creedmoor. Goal is to make power factor (which it does easily).
Powder: H4350
Brass: Lapua virgin SRP
Primer: CCI450

Platforms: 1) Accuracy international AX308 MC M27 Short action 24" Bartlein 8 twist by the one and only Robert Graduous 500 rounds on it prior to load workup SRS Ti Pro 4 muzzle brake 2) Impact NBK w/ a proof Lone Peak prefit carbon 24" 8 twist 1350 rounds on it before load development (headspace perfectly and fired dimensions are near identical to all of my other 6.5 CM barrels I've owned) MDT CRBN stock, TMB tuner brake 6.5mm.

Ladder, seated 0.02" jump on the AIAX, 0.045" on the proof Impact/LP (which is 2.945 COAL for both) b/c of throat erosion likely
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What is crazy is the AIAX ladder shots were touching into the same hole but was .5" wide, I couldn't believe it given the velocity dispersion but demonstrates the accuracy of the AI platform, and how you can't rely just on group size at 100yd for long range consistency. I did not have any pressure signs on this test, 75 degrees at 4500 ft elevation.

AIAX: 41gr initially had the best group and SD/ES 2680 fps average, SD 5, ES 9, 3 shot group .211 MOA ; but, after going out for a seating depth test 41gr was much hotter and had heavy bolt lift at 2730 fps, so pulled the remainder of the rounds and backed it down to 40gr and one load at 39.5gr which all absolutely hammered! Bore scope did NOT reveal any carbon rings in neck of the chamber or in front of the lands. SD and ES on 40gr weren't the best however.... 39.5 though is great at 0.190 MOA seated .02" off the lands.
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Impact NBK LP (lone peak) proof factory prefit carbon 24" 8 twist: Went w/ 40gr based on ladder satterlee test, w/ exception of 2 outliers the SD and ES's of this 40gr charge was great at 2603 fps average. Accuracy was pretty solid too seated at 0.045" 0.306 MOA, and .075" off lands at .203 MOA, using the TMB tuner brake at 0 setting. What worries me is the migrating 3 shot group could have been the nightforce NX8 4-32 but I had dialed out ALL of the parallax, hopefully its not the MDT CRBN stock which is not bedded but installed the impact correctly. I had a .03" seating depth off the lands that opened up to .643 MOA but I think this was me b/c I'm not used to shooting a fairy light gun.
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As always workup slow and use this info at your risk. Everyone's powder lot is different and I'm shooting at 4500 ft elevation.

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Scope identitification needed.. info please

I recently acquired this in a collection that I bought. Amongst the collection was a new unfired Barrett M82 from 2004. The seller stated that he had an optic to go with it and presented me with this. I know it is a US optics and I believe that it is the SN 3 model. The scope does not look to ever have been mounted and it does have a Horus vision reticle. I believe to be H 27 or a variant of such. All of the SN 3 models that I see typically have a larger elevation knob( Erek) . This one has capped turrets that appear to be MIL based where is everything I see in literature showed MOA , can someone shed me a little info on this? Anyone have an idea what it’s worth? Us Optics is calling me back Monday with a little data, but I figured u guys would know .

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