Forums › Forums › General Discussion › Bedding Tikka Scope Base
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18 Bullseyes
If it was me…….. I'd run some rounds through the gun first to see how it holds zero (or not) before worrying about attention to the rail bedding issue.
There's a pretty good chance you should be OK with it the way it is…
If you do get variances (shot to shot) when testing, then the JB Weld fix would be my next step.
Good luck!
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1 Bullseye
Hey thanks for the advice! I went ahead and bedded the base. I ran some rounds through it before and the accuracy was fine but I was consistently hitting high at 500-600 yards, as opposed to what my ballistic calculator was calling for.
After bedding, the accuracy is still great! I'm still hitting high, however, but the tracking is spot on. So, my hypothesis is… and I hope not to start a debate with this… but I believe my barrel (Bartlein with 5r rifling) is causing less bullet deformation, thereby decreasing drag and increasing ballistic coefficient!
I tried the ballistic truing feature in strelok and when I used the modified bc, I was spot on at least to 600 yards. Now I just have test this hypothesis at longer ranges. My shooting friend and I should be able to get out passed 1000 yards finally so we'll see how it goes!
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105 Bullseyes
I'm asssuming you guys are measuring speeds with a crono? To get SD and ES results.
I've had loads that were crazy accurate when shooting 100yrd groups but after getting speed data realized they sucked for long range.I've also had a similar situation to what you are experiencing with my 308 CTR / Vortex HSLR (1 click = 1/2″ @ 100yrds) but the reverse. I thought I had everything dialed in with everything for ballistics but gun was “low” out past 550-600yrds on moa targets. I'd miss just below or catch the bottom of the target, a couple inch difference progressively getting worse the further I would shoot.
I had speed data, good accurate load worked up but my gun would not match drop charts out past 600yrds…but was dead on with a 100yrd zero… or so I thought. I had the scope checked by Vortex and no issues. I ended up re-zeroing the gun perfectly @ 300yrds. What I realized was I wasn't “perfectly” dialed in at 100yrds and 200yrd – 300yrd tuning cured the issue.
Try re-zeroing your rifle at 200 or 300 yrds to match you scope data. You POI might shift ever so slightly at 100yrds but it may mean the difference out past 600yrds on hitting moa target.
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1 Bullseye
Yup! I use a magneto speed chrono. I also trust my scope, SWFA 16x. Never had a problem with tracking. I know my system works because I have scored first round hits with my .223 out to 650 yards in my standard conditions, and also at 680 yards in Wyoming with a 3000 foot elevation change! When I use the velocity from the magneto and the higher bc, it matches exactly the results I get from 300-600 yards, so hopefully when my friend and I can get out to longer ranges we will see how it matches up.
On a side note, I never go by 100 yard groups. For one… I can't afford it haha. I get one box of bullets and work up a load in as few of rounds as possible. I shoot a latter test and go by velocity. Then I do an ocw test to really narrow it down. I usually can get it done in 15 rounds, and under 10 rounds if i just go right to the higher end of charge weights.
I actually never test at 100 yards. Like you said, when I first started reloading I'd go for 100 yard groups alone, but i found out this does not guarantee long range accuracy. Now i test at 200-500 yards and I test for least vertical dispersion and tightest velocity spread.
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105 Bullseyes
FINALLY, someone doing all the right stuff, and can talk about particulars…
I'm confident you will figure it out. -
1 Bullseye
Thanks man I try! Haha. A lot of late nights researching!
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