Rifle Scopes UH oh!? moments in shooting.....

[XTR]

I've been "getting ready" to shoot in F class for a few months now. (honestly it's been closer to 10 yrs, I've just gotten serious in the last 8 months) Doing load workup, reloading and getting my gear together and just getting some trigger time.

There is a small 1000yd match every Monday afternoon at my club (ORSA) and last weekend I finally got all of the bugs (I've identified so far) worked out in my reloading and load development. Rifle is shooting 1/2 inch or tighter at 100 yds, lots of chrono data and I'm planning to get out to the range and get some longer range dope this week.

Since I finally decided on a load for now and I've got my 100 yd zero set on my knobs I decided to check one last thing today. Travel on my NF 32BR...oops, I need another turn. I have 3 down and 5 up (6moa per turn). Looks like that 20MOA base is not enough. Thanks to SWFA, 2 day shipping, and American Express, I should have a new 30MOA badger in my hands in time to mount and re-zero it this weekend.

I've known since I decided to go with one of the NF BR scopes that they don't have as much travel as the NSXs and that I'd need to have it zeroed at the bottom of the adjustment at 100 yds to get out to 1000, but since I've been doing load development and Zero really wasn't defined yet I hadn't thought about it that much. I think to my credit at least I thought about it before I discovered I couldn't get shots to fly further than 800 yds.


Assuming my calculations are correct and JBM is telling me something close to the truth I should be OK with a 30 MOA base, that'll leave me ~8MOA off the bottom at 100 and about 3 MOA from the top at 1000.

If in reality that doesn't work I'm shooting with an NP-2DD I can always use the lower dot next week, (it gives me another 5+ MOA at 32x) till I can get a 35 or 40 MOA base. I'm sure someone out there makes a 35.

 

[maladat]

Re: UH oh!? moments in shooting.....

Murphy Precision will make you whatever base you want.

It sounds like you are saying you need ~37 MOA to get to 1000 but I would expect an F-class rig to get there in less than 30... are you shooting F/TR?

 

[XTR]

Re: UH oh!? moments in shooting.....

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: maladat</div><div class="ubbcode-body">Murphy Precision will make you whatever base you want.

It sounds like you are saying you need ~37 MOA to get to 1000 but I would expect an F-class rig to get there in less than 30... are you shooting F/TR? </div></div>


F/TR, Shooting 175gr SMKs over 44.1gr over Varget at about 2660 according to my chrono. I've not gone over to the long ranges to confirm the numbers, if the chrono is off I it will get me some, but JBM says it will take 37.7 or maybe a little less to get there. Pushing it to 2750 only buys me a little over 3 MOA. I'd have to get a 175SMK up to 2850 to get it there in 30MOA and I don't see the need to push it that hot. When I read some of the loads some other guys make and it makes me wonder why they don't just go ahead and get a magnum caliber rather than push the edge with the 308.

The rifle I have today is creeping up on 2000 rounds. It has a 24" Rock barrel. I'm going to shoot this one out and then I'll get a long tube on it and I should be able to get my velocity up. I know I don't have the perfect rig to play the game, but I want to get out and play anyway.

 

[maladat]

Re: UH oh!? moments in shooting.....

Cool, sounds like you have it figured out.

If you do need an odd size base Murphy Precision will do anything you want and he only takes a few days. I'm sure he could do a 33.6 MOA base if that's what you wanted.

(No relationship other than satisfied customer - had 20 MOA two-piece titanium bases for a lightweight build in less than a week.)

I have no experience shooting F-class but my experience in a variety of shooting sports is that most of the people involved are helpful and friendly and will encourage you to show up with anything you can possibly use to try out their specific sport. And really, you're not that far from a typical F/TR rig.

Also, a lot of the F/TR guys push 308 to ridiculous levels because F/TR requires 223 or 308 and their goal is to play the game. In Open, people are shooting different stuff. The national F-class Open record was set recently with a 284 Winchester shooting 180VLDs at ~2900fps (26 MOA @ 100 yards).