What I see from gurus are pictures taken in houses which aren't haunted. "see...no ghosts".
I'm glad to see Brent is actually LOOKING for the ghost before taking pictures. Thats gonna be the only way to catch it.
I wish I could test one of my rifles there. It's zero'd@250, and has always shot tighter there than 100(in moa).
Good luck to ya
Location: The rifle range, or archery range or behind the computer in Alaska
Re: sleepy bullets and group size
I cant explain it, but I was shooting a month or so ago testing the 155 AMAX. At 100-600 yards the groups were all between .75 and 1.0 MOA. When I went to 1K (same day and time frame) it shot 3.5 Inches. I figured it must be a coincidence. I went back to 1K and shot a 4.5" group. No coincidence there! No I was not high, drunk or under the influence of any aliens or the such...These phenomenons exist. Why?? Nobody has yet to explain it, or at least prove it scientifecly.
Bear in mind that the example above was not different days or in differant weather. It was all on the same day. All groups were fired within minutes of eachother. It will repeat this craziness almost daily.
[ 02-27-2004: Message edited by: meichele ]
Long range shooting is a process that ends with a result. Once you start to focus on the result (how bad your last shot was, how big the group is going to be, what your buck will score, what your match score is, what place you are in...) then you loose the capacity to focus on the process.
I have a couple targets hanging on my reloading room wall. They were shot after a great amount of time and effort setting up an experiment. I shot 2 10 shot groups at 100/200/300 yards onto 8-1/2x11 targets. These were shot with some initial setup so the bullets would all be on paper. What I did was arrange the targets on tripods with transpartent targets. (thin paper targets with no backer). The same bullets traveled through all 3 targets and the same group showed up at 100/200/300 yards.
The test showed that THE SAME BULLETS after passing through a sheet of paper arrived at a tigheter MOA at 300 than they did at 200 and a tighter MOA at 200 than they did at 100. Now, this is not my immagination and I'm getting a little tired of people who say that they can't believe this when they have never tested it for themselves. Perhaps my 10 shot groups (2 of them) shot this way (it took an entire day to set up and get results). is an accident. I don't think so. My inclination before this and my entire reasoning for doing the test was that I had seen this phenomenom regularly and had no choice but to test for this very condition. I found it to be true. My 1K guns show this every week as do yours.
It never fails to amaze me how people can shoot guns regularly and do all of it with thier eyes closed.
If you have something that you disassemble and reassemble enough times, sooner or later, you'll have two!
I've seen a number of attempts to explain this apparent phenomenon, but I think that the answer may lie in a topic that I've never seen discussed in these forums. The cause may originate from "aerodynamic jump" which is a lateral displacement of the bullet that occurs at the muzzle due to bullet tip in the chamber, i.e., the lack of concentricity of the bullet and the bore. As I understand it, the bullet exits the muzzle and immediately must deal with an abnormally high yaw angle. This angle causes a sideways movement, but then the bullet stabilizes and heads down range. The jump is not trivial in terms of distance and may explain why group size in terms of MOA can actually get smaller with range.
I'll be shooting more than one group to decide this one for myself. 3-5 groups all indicating the same exact thing would peak my interest, like 1.5 MOA at 100, then 1.5 or 2 MOA at 300 would be something to consider, if wind wasn't an issue that is. Our shooting 300 yard range at Birchwood is pretty protected, and windless days are found a good share of the time but, that's not really the case on the river bar I do a lot of shooting on. There are good calm days, but wind is still moving at times up to 1-2 MPH here and there, on occation it's dead calm.
At one point along the way I was getting this impression groups were often better at 300 that they were expected to be from my previous 100 yard groups, and it didn't take long for me to realize if the air was calm, I could at least, for the most part, elliminate throwing out a possible good load, if this were to be happening by testing at 300, not 100.
I still hate shooting at 100.
Shot a 1.2", 3 shot group at 300 today with the kids 308. Wish I could say they were all that good, but another 2.75" and 4.25" was reality talking! [img]images/icons/grin.gif[/img]