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Optics Nightforce NXS C237 5.5-22x56 MLR

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Nightforce NXS C237 5.5-22x56 MLR - $1400 shipped

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This scope is used, but it very good condition. Glass is perfect and everything functions perfectly, just shows typical normal cosmetic wear from use. This has the non-HS MRAD turrets w/ 5 mils per revolution. It includes the original bikini cover, paperwork, and microfiber — as well as a sunshade, which does show some wear around the edges.

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7-08 vs 7 SAW vs 7CM vs ? for Large Frame

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After the War, Army Ordnance and Fort Benning wanted a smaller COL than M2 ball (.30-06), but with the same performance. So they shortened the case to something similar to 300 Savage and increased the chamber pressure, added a boat tail to retain energy resulting in the T65 and later 7.62x51.

If they had done the same thing with the .450” case head .276 Pedersen, we would have had something with a 2.400 to 2.600” COL, running higher pressure in the M14, FAL, G3, and AR-10.
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Velocity differences between 6.5cm brass brands

I appreciate the feedback. I expect some change but some of the numbers just seemed all over the place.

I would like to be able to load an assortment of headstamps so they get close to the same velocity with a particular bullet but it just doesn't seem achieveable. Some brass gives tighter SDs, some is overworked and is disposable, some I have more of for when I need to load up for a match so I different uses for them.

I am trying to keep tabs on everything by recording velocities and putting them in a spreadsheet where I record the day's weather, powder/primer/bullet/case type and number of loadings.
I think the best you can do when mixing headstamps is to measure each case's cases volume/capacity (not weight) and that should be a close as you can get for consistent velocities between them. Keep in mind there are other issues going on, like differences in the thickness and the alloy composition of the brass that'll react differently to the expanding gases as well as sizing which will effect pressure/velocity. It's simply best to stick to one headstamp of the same lot at a time. Otherwise, it just get complicated. ;)
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7-08 vs 7 SAW vs 7CM vs ? for Large Frame

With Alpha Munitions 7mm SWC brass, the choice is pretty easy.

If there’s a cartridge I load for and Alpha makes brass for it, I will just buy that and not look back.

I’ve loaded for 7mm-08 in the past, and really love that cartridge. It’s what 7.62x51 should have been, and we should have known that from 7x57 Mauser performance already. 7x57 Mauser was one of the best military rifle cartridges ever developed and mass-produced.

Instead, we stubbornly stuck with the .30 cal bore because of institutional biases in Army Ordnance Board/CONARC. I don’t hate .30 cal, but you just get better performance from 7mm with higher sectional density for weight.

.276 Pedersen was our missed opportunity, which would have solidified 7mm in the US arsenal system going into the 1950s after the War. Would have made an awesome little AR-10 with a smaller frame, higher mag capacity, using the Pedersen’s case head.
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Mammoth Sniper challenge 2 AAR: very late edition

In terms of placing, we did horrible, I think we were 22 or 23 or something... In terms of what we were there for we did great. New teammate who has never shot a competition before in which our only time together was to get him zeroed on one of my rifles. Our goals in order were to (1) Not get DQed (2) Not Zero a stage (3) Not come in last (4) Figure out our flow (5) Stay happy and healthy. We left some really easy points on the table, but we were able to meet most of our goals. We zeroed our first stage, but our first stage was the simultaneous shots from the back of the humvee on day one stage one. The rain and mist was good enough that we didn't even see the first sequence. We did get shots off because when we were coming onto time we just sent three at targets 2 in order to move past targets 1 but I made that call just a little too late. It was a grind, it was a blast, and heck yeah we met some great people.
Congratulations man! The rain suuuucked! We dropped a ton of points on our very first stage Friday morning because of the downpour. Your hierarchy of goals mirrored ours.

Knights Armament SR25 6.5 Creedmoor

I'm naturally impatient with a gas gun (a personal problem, I know), so it's probably the same cadence as a bolt gun. Most of the time, it involves shooting and then going through the fundamental checklist, then shooting again. In my experience, unlike a bolt gun, where you can engage the bolt after breaking the shot, on the SR25, you need to wait through the unlock process before shooting again.

When I'm doing a private training course that is the number one issue I have with most people, keeping that trigger pulled to the rear until your rifle recovers then reset.

Next time you're out give this a try.

Spend a good couple hours shooting your Large Frame gassers to the point you feel it's just mussel memory and your accuracy is consistent (not a bad AR day). Then switch to your Bolt rifle that usually is the hardest for you to group well, I know this sounds weird but don't even look at the damn bolt gun and keep in your mind your just grabbing your Large Frame Gasser. Once your behind your bolt rifle just do everything the same as you do with your gasser and I guarantee your accuracy will improve.

Bullet jump on 5.56x45 when slammed into battery

Have you checked to see what the actual bullet jump is from your bullet at load length to the touch point in your throat? In most AR chambers I've found that the jump to the lands is more generous than most think (depends on the bullet and profile). If you have a 50 thou jump to the lands, I wouldn't worry about the bullet moving a few thou when chambered .... unlikely that it would change accuracy that much.

If you can load at max mag length and get within 10-15 thou it might make a difference... but I haven't found too many chambers that have a short jump.

I would also pay attention to the number of firings on the brass and make sure you're not getting too much spring back (or the neck tension you expect)
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Knights Armament SR25 6.5 Creedmoor

Absolutely. Those are great groups. Im curious what cadence are you firing at? Quicker than you could with a bolt gun or are you taking your time? Either way, excellent shooting.
I'm naturally impatient with a gas gun (a personal problem, I know), so it's probably the same cadence as a bolt gun. Most of the time, it involves shooting and then going through the fundamental checklist, then shooting again. In my experience, unlike a bolt gun, where you can engage the bolt after breaking the shot, on the SR25, you need to wait through the unlock process before shooting again.
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