Rifle sight in.
- Thread starter NDMuley
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cahunter805
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First thing I would check that the barrel is free floated all the way to the action. It should have plenty of free float also.
Sent you a PM.
Sent you a PM.
VikingsGuy
Well-known member
My initial reaction to a string like that is (a) the barrel is heating up, so try leaving leaving more time for barrel cool down between shots and see if that improves or (b) make sure the recoil hasn't pushed the gun back enough over the first two shots so that the barrel would be resting on sandbags for third shot instead of forearm.
cahunter805
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Barrel heat can be a factor especially if it's a super thin barrel. If so I wouldn't worry about it near as much as where your cold bore shot is hitting.
I guess in a perfect world only one shot would be needed, not two or three. Me, I like a rifle that will put 5, 6 ,7 or 10 shots plus in the same place time after time. Just me. mtmuley
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Deleted member 20812
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Right there with you
Wjesswheel
New member
Go to Jbm and run their bullet stability calculator on you setup. I ran what I think you have by guessing. You should run it you might find that there are better bullies for your set up.
Don Fischer
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BC ,536 Vel 2915
sight height 1.5
vital zone 8"
max PB range 323 yds
max PB zero 276 yds
100 yds +3.3"
200 yds +3.5"
250 yds +1.6"
300 yds -1.7"350 yds -6.6"
@ 300 yds the bullet should be -4"
Take the rifle out and shoot these ranges and see how you do. This has worked great for me!
Don Fischer
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Oops. That should have read "at 323yds the bullet should be 4" low".
Wjesswheel
New member
You asked me this awhile ago and just shot again Sunday making sure everything was correct. Here is what I got. Zeroed at 200yards, spot on jbms call at 300, 1.1 Moa lower then jbms call at 400yds, . 7 Moa lower then jbms call at 500, and spot on again at 600yds. Everything is entered correctly and it doesn't matter how I play with the velocity Jbm never comes up with what my rifle and round is actually doing. Yea 1.1 Moa at 400 yards isn't that much but if your off 4 inches on your poa and then factor the 4 inch difference could be the difference between doa and doing a lot of tracking. Any ideas on why it's off so much? That load was shooting right at .5 Moa at 600. It's also the reason iam taking a lot of rounds out there and verifying with the 30 degree lower temps and 3500 ft change in elevation who know what it's goin to do without verifing
VikingsGuy
Well-known member
Interesting. Also possible vendor bullet BC is off. Have you tried using your range data to back calculate BC?
Wjesswheel
New member
Wow, can't believe that slipped by me. Great call and it is a very new to the market bullet should have though of that.
Dan O
Well-known member
When shooting the longer ranges other factors can come into play. Head wind or tail wind can cause some issues. Mirage can also be another factor. Then sometimes you just have to shake your head and try again LOL.
