AJ Peacock
Well-Known Member
Micheal,
I don't take your posts as argumentative at all. I know you're a knowledgeable shooter yourself and take your (and others) observations seriously. I'm here to learn just like everyone else.
Can you tell me about the particular barrel; was is a thick heavy bull barrel or a thin sporter barrel?
I'll tell you the one I'd really like to get to the bottom of is the phenomena where rifles group smaller in MOA at longer range than short. I've never directly observed this myself, however I did have a 7mm Rem Mag Sendero that 'seemed' to group ~0.75" at 100 yards and ~1.00" at 200, but of course the only way to know for sure if the groups actually 'converges' is to shoot thru two targets at once. There's just too much anecdotal evidence on this one to ignore it and I can't figure it out. My current hypothesis is parallax. Scopes that are properly adjusted for parallax at 200 yards will have some aiming error at 100 yards if they're not properly adjusted. I can't find anything physical to explain how a group of shots would converge in from all sides as range increases.
There are some unexplained things that happen, but rather than conclude that something unnatural is actually happening, I choose to accept that I simply don't know enough yet to explain everything and keep an open mind in search of the answers.
Take care,
-Bryan
Bryan,
I really appreciate your learned postings on ballistics. One thought I've had regarding better groups at longer ranges, was the possibility that aiming error was minimized at the longer ranges. Let me explain. If I'm shooting at a 1" dot at 100yds, I am using approximately a 1moa dot for aiming, if I take that same target and shoot at 200yds, I've just cut my aimpoint in half and have probably reduced my aiming error (from an MOA perspective) by a significant amount.
Just my thoughts. Here is some anecdotal evidence for you. I have a 7mm Rem Mag that is on it's second barrel. I shot the first barrel completely out and am probably 1/3 of the way through the second one (30 years worth of shooting). I currently have a load that will print under 1/2 moa nearly every time at 100yds. The best I've ever been able to do at 100 yards is just over 1/4moa. I recently shot a .267" group at 200yds with it, which is by far the best group that rifle has EVER shot (from an MOA perspective). I was aiming at a 1/2" square paster.
Anyway, that's how I explain it. Kinda reminds me of the quote from the movie "The Patriot" "aim small, miss small"
AJ