I don't disagree with any of this.
I have found .22LR's certainly "improve" from new over the first thousand rounds or so, but I haven't found this with my new centrefires. But perhaps rifle barrels and ammunition have changed since those old shooters proved this to be fact? Not everything stays the same.
If you measure your firearm's accuracy by group size then you need to fire enough shots to have good data, if you measure your firearm's accuracy by it simply placing its first round precisely where you want it, then a single shot is all you need. But you also have to zero your firearms differently. The first you fire some groups, measure the mean point of impact and zero to that point, the second you would fire a cold shot, let the rifle cool right down, fire another cold shot, and so on until you have enough data points to measure a mean point of impact for cold shots, then zero to that point.
The issue for me with only firing three rounds in a rifle that might only group three or four minutes is having enough data points to get a good zero. With a three-minute rifle, it will put a bullet somewhere within about 45mm of where you aim it at 100m. So, you fire a round and it hits 45mm high-right from point of aim. If you already zeroed it then you can confirm it's still zeroed and go hunting. But if you zero the rifle to that one shot, and it happens to be the low-left round in your potential "group", then you're actually zeroed about 90mm high-right. For close-range chest shots on medium game it's probably near enough not to matter, but I think most of us like to be a bit more certain than that. Ammo is expensive, but still cheaper than a lost deer.
Wapiti wrote:I can tell you one thing that's gospel, if 3 shots don't give you a happy face, don't waste your money firing 10.
People have always argued about how many rounds to fire to establish a firearm's "average" accuracy, and I see online squabbling to the point of keyboard hauntings, but what's the point?
It's a Winchester 73, not a target rifle with free-float barrel, stiff stock, cartridges developed for consistent ignition and consistency blah blah. You have wood contact everywhere, barrel bands or magazine tubes inside timber forends, all the things that make a rifle struggle to be consistent as it heats up and moves.
And I'll just throw this one in, years ago, when the very credible Guns 'n Game magazine was in print, there were not just a few proven instances in articles where rifles slowly "settled in" after 50, 100, sometimes more rounds fired and with good cleaning regimes. And these blokes lived daily with firearms on farms and tested them professionally in their spare moments when not working the land. If these blokes say it is a fact, it is.
Another thing that, for me, is irrelevant is where the 5th, 6th whatever shot goes. I couldn't give a crap. The real prize is the cold, clean first shot, maybe the second or third that when fouled, shoots close to that. After the first shot if missed, your target is doing the bolt.
If I shoot a 3-shot group when testing that shows huge promise, I'll let the barrel cool down while I go back to the shed, load another 3 of the same with exactly the same dimensions in the shoulder and bullet jump, and fire this 3 from the magazine. No cheating by waiting 5 mins between shots. If this does the same thing a 3rd time with the 2 cool-downs and resetting up the rifle 3 times, cold to hot, it's going to work just fine. Sorry, but nobody could put forward a good argument that this 3-shot group regime is wanting in any way. It's torturing consistency-wise way more that firing 10 shots in a row, watching your heat sink, only once.