mrd

tiple tap

triple tap

Sorry to hear it. Seems there are different levels of cross dominance.

I disagree. I am cross-dominant, right hand shooter and left eye dominant. With red dots I think there is no disadvantage, being cross dominant, it might even work in our favor. I shoot with both eyes open and use my dominant eye for target focus, my right eye picks up the dot and superimposes it on the target. I don't even have to remove the front cap from the red dot sight to shoot, but of course I get better FOV if I do. Bigger window is just an advantage in very awkward situations with rifle or with pistols where sloppy index can make you lose the dot.

I can run some numbers in quickload when I have the opportunity. But I think the question is incorrectly put. The question is not really about slow vs. fast burning powders nor about if a bullet starts slowing down with a powder that is fully burned before the bullet exits the muzzle. An exposion is the rapid change of state from solid state into gas. The question should be if the powder burned has generated enough gas (=pressure) to be able to accelerate the bullet until it exits the barrel. This is more a function of mass in the powder burned => gas volume vs volume of barrel vs friction/drag. I understand the thinking, however. A slower powder generally needs more powder to generate the same power factor. More mass burned = more gas.

Don't go too light on your buttplate/stock. It will make your rifle feel front heavy. Lots of proficient shooters go with heavy stocks to make the rifle swing/transition better.

Many people seem to prefer their CMMG RDB short stroked with a Blitzkrieg/Kynshot 5005 buffer and 308 carbine spring, preferably JP polished, running 135-140 PF ammo. Optimal setup might vary, depending on your load and barrel length. I run my 16" CMMG short stroked with a Kynshot 5004 buffer, which is slightly shorter, weight is pretty much the same as 5005. The 5005 was out of stock when I ordered. My setup gives a little more pre-load on the spring. No idea what is better, 5005 or 5004, I haven't compared them. It's night and day compared to a bone-stock CMMG 16", though! Softer recoil and much less dot movement.

Great idea. Just thinking... Why not turn the set screw the other way round? That way you could adjust it with a hex wrench instead of filing. If you cut the set screw appropriately short before install then it will never reach into the trigger pin on adjustment. When adjusted, add loctite. I think this method would be slightly easier. The xtreme DA trigger is longer reach, the stock trigger is better for us with short fingers... I bit the bullet and got the Henning short reach flat SA trigger and moved into Standard/Limited. It's no fun to shoot a pistol that doesn't suit your hands.

Maybe. I would compare accuracy between the powder loads and take that into consideration too. I think a smidge less softness is something that training can compensate for, but you can never shoot better than the inherent accuracy of the load in your gun.

Left eye dominant, right handed. Here's how I shoot, I find this the most natural, fastest and best for me. Pistol with iron sights - I shoot right handed, holding the pistol in front of my dominant left eye which focuses on the front sight. (Exception is right barricade, where the barricade works as a natural patch of sorts and I use my right eye.) Pistol with red dot - I shoot right handed, using my dominant left eye FOR TARGET FOCUS, keeping the pistol in front of my right eye, using the right eye to pick up the dot Rifle with magnified optics - shooting right handed, squinting/closing my left eye. Rifle with red dot - shooting right handed, both eyes open. Dominant left eye for target focus, right eye picks up the dot. I don't shoot rifles with iron sights. I can imagine this would be a slight disadvantage, being cross-dominant, but I imagine I would just squint as I do when shooting with magnification. For red dots, pistol and rifle both, I think being cross dominant is actually an advantage, since you use target focus and pick up the dot with your non-dominant eye.

This combo worked without problems in my AR-15.

Interesting. Where did you get the formula for recoil from? I don't mean chamber pressure, which refers to max pressure during combustion. I mean the gas pressure inside the bore of the barrel, just when the bullet exits the barrel. The gas volume works the comp only so far as pressure being a function of gas volume vs bore volume. Same load works the comp better in a short barrel compared to a long barrel. The gas volume is the same in both barrels. However, pressure is lower in the longer barrel because the gas volume is spread out in the larger volume of the longer bore. Also, a longer barrel cools the gas more and decreases volume and thus pressure.

Is this really correct? Recoil, as far as I know, is generated by the impulse from the combusting powder load - not the energy/velocity generated into the bullet. With a longer barrel you can use less powder to achieve the same power factor, and thus have less recoil. Also, a longer barrel generally have more weight, which also absorbs recoil. However, if you use a comp, a shorter barrel can be better because there is higher pressure in the gas generated to work the comp. Correct me if I'm wrong, I'm here to learn as much as most of us.

Actually, this is an universal truth, at least as far as slower powders reduce extreme spread. However, such a slow powder as N350 is not entirely combusted even in a 16 inch barrel. N340 is almost entirely combusted in a 16 inch barrel, around 99% combustion. Slower powders also give more gas for the comp. For accuracy slower powders have a slight advantage, but In my experience, even quite high extreme spread does not affect accuracy at distances less than 100 meters/yards. Also a shorter recoil impulse with the faster powder can be beneficial for less dot bounce, but recoil impuse seems softer with slower powder. In the end it is mostly about preference, I guess.

Oh-oh... Sorry if this is a hijack - I have the Strike Industries Hex selector switch 60/90 3 in 1 safety on its way, is it compatible with the Hiperfire Eclipse/24c?

Hm, I'm also right handed with left dominant eye. However I think this is pretty optimal with a red dot. I pick up the dot with my right eye but focus on the targets with my left. I thought that was how it supposed to work. Works with both rifle and pistol with red dot. Isn't this how it's supposed to work - to pick up the dot with the indirect vision and focus on the targets? With iron sights I have to squint my left eye on rifle and on pistol I position the gun so the sights line up with my left eye.

When I checked the weight it was over 20 oz, though.

All the input has made me come to the conclusion that the best for now will be to stay with my single scope 1-8x Swaro Z8i. I might upgrade to a 1-10x sometime in the future, when there is something on the market that doesn't give anything up compared to my Swaro. The present offerings in the 1-10x variety, like those from March or Ior, have lower field of view at 1x or other disadvantages. Thanks to everyone for contributing.

This. I'm using the Taccom ULW.

At that price, why not go with the Aimpoint H2? It's another 2 oz lighter and I don't see any downside. Serious question.

I'm thinking that if I develop an accuracy load and then tune the recoil/buffer system to that load, then difference in dot bounce will be quite insignificant compared to a softer load. It is a rifle, after all. At least after some getting used to it, I'm hoping the benefit from higher accuracy will more than compensate for the recoil.

If I were to shoot rifle matches with my PCC rig, I'd start developing a load for accuracy on the hot side and build everything else around that load, including confirming actual hold-overs - not just estimate or calculate. Actually, that's what I'm starting to do anyway...

Well, if you trust your feeling better than the government and a laser security officer, then go right ahead. Do what you want as long as there is just yourself around, but don't jeopardize the safety of other people.

I also like this build the best, apart from some personal preference concerning the furniture. I had the CMMG ripstock on my CMMG Resolute 200, but I quickly exchanged it. It was not comfortable for me, it's quite sharp towards the chest and my beard got snagged by it more than once. Also, I like a slightly heavier stock for a more rearward balance point. I don't see a comp/muzzle brake in your list. Look for something with upwards ports rather than side ports, at least if you prefer low dot movement over soft recoil. I bought the CMMG complete rifle, but ended up changing all the furniture, trigger (Hiperfire Eclipse), comp , etc... Only original parts left are the barrel, bolt, upper and lower. Not the smartest way around, but on the other hand it runs 100%. Not a single glitch/misfire/FTF/anything! If I'd do it all over I'd go with the qc10 too, they have a lot better fit and finish. Hard to choose between CMMG and Taccom delayed systems - haven't compared them.

Very informative, thanks!