Grip. Technique. Stance. Follow through. Trigger pull. Lots of little things that make that first shot less than ideal. Good enough? Sure. As well as you'd do with a much smaller rifle?
Okay, this ^ sounds like a point that supports my side of this debate rather than yours!
Why on earth would any of those factors you just listed be easier to control and/or perfect with a smaller-bore gun as opposed to a larger-bore one?
Again...if we're talking about speed of repeat shots, then yes, the big gun is at a disadvantage because it is that much slower to regain the sweet spot for all these factors. But if the two guns are laying on the table in front of the shooter, then picking up either one and getting into position, aiming and firing a single shot...and hitting!...is equally easy or hard as the case may be.
And again...if you pick up the larger-bore gun, and as you shoulder it you're thinking about how much it's gonna hurt and how loud it is and gee I wish I were not doing this...then you can forget about shooting it well. So, shoot it enough to learn that it's not a horrible experience, and from then on it won't be.
I think I'm lucky that my father started me out on my centerfire shooting journey with a shotgun rather than a rifle. I was experienced and comfortable with my old Ithaca 37 12ga before I ever put a round downrange from a "high-powered rifle", which of course meant a .303 back then. So when I started with the Big Gun, my dad just said to hold it firmly...like the shotgun...and squeeze the trigger...like the .22lr Cooey. He also commented how much easier it would be to hit with the .303 than the 12ga, because the gun had sights and the target wasn't moving. He was right, too.
My best buddy learned from his dad, but he learned a completely different lesson. His old man went on and on about how much the gun would kick, how it would and could hurt you if you weren't doing everything right, how it would rattle your brains and scramble your vision and bruise your entire torso and knock you on your ass. By the time that Mike actually fired the thing, even I was scared of what was happening...and I was just watching!
To this very day...my friend Mike can't stand recoil...or at least he thinks he can't, which is the same thing.
Incidentally, both Mike and I were already 6 feet and pretty solid (for kids) back when we had these ideas ingrained in our heads. Another close friend was almost a foot shorter and probably less than 100 pounds at that time...and he could and would fearlessly shoot any gun he picked up, and shoot them well. His dad wasn't a shooter at all, so he learned from mine...who basically took him with us when we went out to the gravel pit and gave him several years of training and experience in a single afternoon. The little guy started with my .22Cooey and by the end of the day was shooting both the 12ga and the .303 alongside us. We all had a fantastic time, one of the most memorable days of my youth.
I am still grateful to my father (RIP) for thoughtfully forgetting to mention that shooting was supposed to hurt. Hell, if I'd known then what I have since learned here on CGN...i.e. that shooting is a terrifying, painful experience...I might have turned out to be something else, something horrible...a golfer, perhaps, or even a computer nerd.
