kopcicle

TLDR 35 Whelen and .270 Winchester fans keep reading. All others, blah, blah, blah... Well, you know there... If I was going to go with the long action, I'd be tempted to chamber in 35 Whelen on one hand and .270 Winchester on the other. Either or both would get a nod to P.O. Ackley for different reasons. The Whelen always had an issue, if it was going to have an issue, with the minimal shoulder. A gas gun head spacing on the shoulder could use a slightly larger shoulder area for consistent head spacing. Straightening the case side wall would allow more shoulder area. The .270 has a bit more left in the tank if case volume is increased via well-known Ackley principals. In addition, I'd hate to lose the advantage the .270 has in reduced recoil compared the 30-06. In both cases the straighter walls are conducive to magazine feeding, reduced pressure on the recoil system, and reduced felt recoil. The only drawbacks I see are the reduction in case taper can lead to extraction difficulties and no commercially available ammunition. Granted the advantage in the .270 is it will accept factory ammunition and fireform it. Not the case with the Whelen. The Whelen however has the obvious advantage of hitting like the hammer of gawd. The Whelen also has a lesser appreciated convenience, a wide selection of pistol bullets. (Use your imagination). So, there are the two extremes. Fast, flat, reduced recoil and with modern all copper high BC bullets supersonic to at least 900 yards. or The hammer of gawd at 225 or 250gr or ridiculous velocities with a wide variety of pistol bullets* with a nod to lower velocity cast lead boolits (w or w/o gas checks) for don't explode the wild turkey or rabbit moments. On the gripping hand, 270 WSM ? Just a thought. Probably goes without saying that an effective adjustable gas block would be mandatory *How many 125gr .357 magnum bullets can you name? 😉

First off, I don't do this for a living so I'm going to ask a daft question or two. Then, my black rifle experience is FAL and STG-57 variants with a dash of G3. I never have cared for the mouse gun, but I guess it has its place. I recently acquired several .308 barrels for who knows what, but I noticed something about all of them. I have several raw machined AR/LR lowers to play with so here we go. The gas port is drilled into the groove not the land. The barrel extension is correctly timed, and the locating pin is exactly where it belongs. Test headspace was perfect. This was on a 16" an 18" and a 20" . So how in the wide world of sports do you time the threads in such a way that the barrel extension makes proper torque, the index pin and the gas port line up, the feed ramps line up, AND the gas port is not drilled into a land? I have a desire to make a few odd chamberings from blanks and all I know I can get right is the gas hole. Have pity on the new guy because I know there is some voodoo I'm missing here.

figured that out after the fact , thanx.

This is called "packed light for the weekend. The prism below the magwell is the usual optic. The clown scope is mounted only for load development. The Ser. 70 MK IV Gov. Colt 45ACP "O" frame because, well, because.

It's just a little heavier. FAL.jfif

The more I learn the more I remember what I've forgotten.I just remembered ...The effect on midrange trajectory (MRT)and maximum point-blank range (MPBR, 5" in this case) by line of sight (LOS) distance over line of bore (LOB)Definition of termsmidrange trajectory (MRT) Highest point of travel over line of sight (LOS)maximum point blank range (MPBR) 5" in this case. No more than 2.5" over or under line of sight (LOS) for a total of 5" .line of bore (LOB) bore of the rifle.Zero, distance in yards the rifle is zeroed at.Near field zero (NFZ) Where line of sight first crosses bullet trajectory. More on this handy number later Sighting in a rifle to maximize the effective range where a dead hold will place an impact no more than 2.5" above or below line of sight is a 5" MPBR. Others may use the term differently or choose a different MPBR depending on size of target, game, or ego.308 Winchester (7.62mm NATO), Federal Sierra MatchKing BTHP, 168gr 1.5" over bore, 2650 F/SecNFZ 25 yards, MRT @ 119 yards, Zero 210 yards, MPBR 246 yards308 Winchester (7.62mm NATO), Federal Sierra MatchKing BTHP, 168gr 3" over bore, 2650 F/SecNFZ 46 yards, MRT @ 138 yards, Zero 227 yards, MPBR 259 yardsI'll supply data on request as it's commonly available. It's just numbers, far too many to post here.I just wanted to show raw data to support the notion that the distance between LOS and LOB does make a difference when calculating MPBR.Also keep in mind that these numbers are derived from a computer model and real-world results will vary noticeably but it's still a good baseline.NFZ comes in handy when you don't have a range where you can set a target an arbitrary distance like 227, etc. For me it's just a way to avoid wasting ammunition.The 308 Winchester (7.62mm NATO), Federal Sierra MatchKing BTHP, 168gr 1.5" over bore, @ 2650 F/Sec having a NFZ of 25 yards is purely coincidental.The 308 Winchester (7.62mm NATO), Federal Sierra MatchKing BTHP, 168gr 3" over bore, @ 2650 F/Sec having an NFZ 46 yards is kind of inconvenient so use 1.3" low at 25 yards (It's in the data)I was just overthinking ballistics again and thought I'd share. Again, I do not solve unsmooth integrals in my head. I just get into some nerdy crap on occasion.

0.009283 , the difference between .277 (see Jack O'Conner) and 0.267717" (or 6.8mm). It's why I'm here. 1, Once is all it takes to prove to me you are a waste of time. Nothing personal, I don't have a lot of time left. 2, Number of cups of coffee consumed before I resemble a human being with any appreciation for, or tolerance of, human stupidity in the morning. Also 2, Number of Scotches it takes for me to speak my mind on topics best left as a political position best left unsaid or unwritten. .270. Winchester, when it isn't Ackley Improved. .277-08. There just had to be something between .264 and .284 that was as easily forgotten as Canasta. 3, One is none, two is some, three is better. 4. Place holder. I'll find something associated with the number four that pisses me off eventually. .308, What was once a purposeful load out is now a form of shelter in place, with extreme prejudice. .311-.315 (cast boolit), British. Actually called a 303 for some reason. They seem to find me. 45, as in ACP. Because I'm old, experienced, well trained, and own several. .451" which is the lead ball size I feed my 44Cal 1851 percussion replica. So it isn't just the British. 50.61 because, NRC Regulations Title 10, Fracture toughness requirements for protection against pressurized thermal shock events. Also 50.61, medium contour barrel, 1/9 twist, Fusil Automatique Léger. If I have to explain, I will. 6.8mm , see above. 66, my age. 7x57, 275 Rigby (those British again) 7mm-08. 8x57. It used to be cheep to feed large ring Mausers. 9, as in mm. Because yes, as a matter of fact I do own several, including a belted magnum. 10, The socket I can never find. So, what's in a number?