Re: New guy needs some advice!
I would remind you that it's all about what you want your rifle to do.
Rifles are better than handguns at any beyond-rock-throwing-distance because they have longer barrels. Then folks go with shorter barrels because they might, someday, maybe, have to shoot the rifle indoors.
Shoot the rifle indoors. Right. Isn't that what handguns are supposed to be for?
If that's not enough gun, get a youth shotgun. Short enough, and definitely not coming up short with the energy output. IMHO, 20ga is plenty much enough for anything you might need to use indoors.
How many of us actually will? I think that's a fair question. When we're done doing that, what comes next? Best time to think about unintended consequences is before they become a concrete issue.
Where rifles are concerned, shortening barrels is sorta like clipping the wings on your cargo plane. If you want to shoot at rifle distances, I don't see how handicapping the key component is helping.
If I want to shoot shorter-to-mid ranges, that's what they make carbines for. But carbines aren't rifles.
It all goes back to what you need the rifle for. If you're gonna reach out and touch, the longer barrel rules.
The shorter barrel can be made to perform, pretty much, but I really don't think that's the best way to employ a short barrel. Like I said, carbines, shorter-to-mid range, like I use my carbine, in the woods.
The thing about the longer barrel isn't how much velocity it can deliver, but how it can deliver a moderate, adequate velocity without withering the bore to a crisp.
Chamberings.
IMHO, there is danged little room left in this world for wildcats. Maybe the same for AI's. When one considers the literally hundreds of chamberings in existence, where, pray tell, do we fit another one whose capability is not already covered by at least one or two already in existence?
When you take the time to stop and think about the AI's, their justification is that they have more capability than their parent cartridge. If they are not driven at high-to-full throttle, they don't deliver that added potential. So by definition, they are intended to run at bore withering pressures and temperatures. If you can afford to run in the fast lane where barrel replacements are concerned, that's no big issue. Most of us can't, though.
Then there's the magnums. They have a niche. I think it's a lot smaller than many others think. Personally, although I actually own one (I inherited a 7mm Mag), I have yet to shoot it. The largest case capacity I actually shoot is the .30-'06/.280 Rem. If it does more than what they can do, I have yet to find a practical use for it.
Those calibers are reserved for bigger game, or target work out at and beyond 1000yd. For defeating the wily paperbeast out in its chosen habitat, the 1000yd line; I find the .260 Rem is just about right. And BTW, I wouldn't willingly stand in front of that same target out there, either.
For shorter distances, my 94AE Trapper Carbine shoots .44 Mag., which I would consider a very good big game cartridge for non-dangerous game in a wooded environment with limited sight lines.
The problem for me, is that the true magnums are what's called overbore. Their case capacity is such that everything inside the bore is subjected to additional pressure and heat; and there we are, back to withering the bore to a crisp. If you really need more energy, use a bigger bullet, not a smaller one running hypersonic. If the .30-'06 isn't enough gun (perish the day), consider the .35 Whelen.
For really long distances, the magnum comes into its own. If you're gonna go there, go big. If you're gonna go there often, the more specialized systems are called for. Just keep in mind the bit I mentioned back there about what you'd gonna actually need a rifle for. How well you answer such questions will determine the larger part of your smile quotient.
Finally, there's practice. Actually, that and training should come first and foremost.
Unless the rounds you shoot <span style="font-style: italic">with any particular rifle</span> are being used for its primary purpose, you're wasting bore life and ammunition. Training, practice, just fun plinking, etc., are what the rimfire is for.
Get a basic, reliable .22LR. Nothing fancy or ultra accurate is needed; just something whose performance reflects <span style="font-style: italic">your own</span> skill level on that given day with some consistency is all you need. Whatever does that with the least cost is preferable. That's the reason we use the .22LR; to save costs in ammo and bore life.
Greg