If you head to the range, stand back and watch various shooters, you can notice some really interesting behavior. One such item I've seen at many ranges, is the failure to expect accuracy. Talented bolt action shooters who can drill 1/2 MOA groups regularly will pick up a modern sporting rifle (such as an Ar15) and totally bail on their expectations. Instead of prone or at the bench, all of the sudden they're standing with poor chicken wing form, blasting rapidly and then decrying the rifle as inaccurate. This isn't a failure of the rifle, it is a failure of the squishy matter between the operator’s ears.
To be totally honest, I'm as guilty of this as anyone. I've had a few Russian communist built SKS's and AK's that were surprisingly accurate, once I started expecting accuracy from them. The same goes for my SBR'd AR's.
This operator malfunction has also given rise to another myth, that shorter barrels are inherently inaccurate. While precision shooting may not be the ideal role for a short barreled rifle, in many cases they are far more accurate than they are ever given credit for. They simply aren't challenged enough to prove it. I've put powerful optics on 6.5" and 7.5" barreled rifles chambered in .300 Blackout, and was able to knock out groups near 1 MOA at 100 yards, without match ammo. This is because I finally started pushing the limits of the guns in my safe, but it isn't all about barrels and scopes.
Try an experiment, take out your most accurate rifle and one you haven't taken to the edge yet. Practice with your precision rifle first (mine is a Remington 700 SPS AAC-SD). Get in a solid prone position with shooting bags (front and rear) and work on all the fundamentals of marksmanship. Get a few groups at 100 yards, then switch rifles. If you have an SBR (or "pistol" equivalent), try doing the same. Shoot just as slow, make sure you and the rifle are both being positioned as if you have the most accurate rifle in the world. Start by expecting more from your range time, you may be quite surprised at what you end up with.
Jens "Rex Nanorum" Hammer
Rangers Lead The Way!