Originally Posted by .30 CAL
So after reading your suggestions I came up with a list of items to help me connect at a mile and changed my goal of hitting a 15 inch target to hitting it on the first shot. Let me know what I forgot or left out.
I agree more shots will increase my odds of connecting so I am going to shoot 20 shots per outing no more no less.
A bigger target will increase my odds of a hit but I am not willing to lower a standard to gain success, so the largest target I will ever shoot at is 15 inches. 2000 Yards and 2640 will be the next milestones.
Windflags, windflags, windflags, at a minimum I will be setting up flags at the target at 1000 yards and where I shoot from. I will probably get the kestral weather vane for my meter so I can monitor the wind constantly instead of just before I shoot.
338 Allen Mag (I wish) 338 Edge is what I will be using. My buddies were using a 300 RUM and a 6.5-284. 6.5 surprised everyone not because it made it but because it kicked up more than enough dust to see impacts.
Even though I would love to shoot prone my prone position isn't developed enough to shoot to a mile (in my opinion) so I am kind of married to the bench. I did notice when I lean into the bench and crush my chest my heartbeat is less noticable. Here's a pic so you can see the flat I am leaning against.
I didn't adust for parralax on every shot because I was maxed out but I did notice on some shots if I moved it then maxed it out again the sight picture cleared up so I will do this for every shot.
I didn't think of cooking ammo this may have had some effect on my high and low misses, so I am not going to shoot more than 2 without a cooling break.
I did have a jacket under my bag and didn't think about it affecting POI. I do need some extra height so the butt of the rifle doesn't rest on the bench so I am getting a taller bag before my next outing. I don't have a scope level so I will get one as well because leveling the crosshairs just wont cut it at a mile, hopefully it brings my left and right in a little bit.
Thanks for the link I will practice timming my trigger break between heartbeats.
I'm going to make a checklist and put it on a card untill I memorize it, hopefully it helps with shot to shot consistency here's what I have:
Bag positon on rifle (needs to be the same every shot)
Natural POA (muscle the rifle as little as possible)
Parralax (adjust it every shot)
Wind (speed and direction)
Dry fire once before every shot
1000 yard warm up prior to shooting a mile
I am also going to keep a mile log book it will have the following:
Date, Time, Range, Ammo, Light (where are shadows use clock format direction of fire is 12), Mirage (can it be seen good, fair, poor), Temp (ambient, barrel?), Wind (current, average)
Elevation used (MOA), Wind call with windage used (MOA), Impact location (clock format high is 12 include distance from target)
Lastly I've been using the following rules of thumb please correct me if I'm wrong or you use something else:
20 Degree change in temperature equals 1 MOA shift in impact
20 percent change in R.H. equals 1 MOA shift in impact
Baro Pressure I do not compensate what is a good rule ie. 1000 ft change in alt equals 1 MOA
Thanks for your help and sorry for the long post.
A couple of things for you.
Your bench has some inherent instability because it's a tripod with minimal support at each point of attachment. The plywood alone has considerable flex to it.
Put some 45 degree angle braces on each leg extending to the corners and it will tighten things up for you a lot. That is IF you don't go ahead and move to a prone set up.
I like the idea of the built up sand box someone else offered.
I would also suggest moving to a very stable bipod rather than the bags. Something like the Tango Down or Atlas or even the versapod. The wide spread legs will help greatly to reduce torquing.
I just bought a versapod and really like it and have a tango down coming next week. I don't like lugging bags around and I'm tired of weak, cheesy assed bipods as well.
Last, the line about parallax adjusment.... . If you are for any reason needing to adjust parallax between shots something is loose in your scope!