Could it just be Operator error? <G>
wPm

 

Possibly. Can you elaborate based on my description? I'm shooting from a benchrest with 1/2" groups at 10 ft. I've remounted the rail and reflex sight 3 times AND used a laser boresighter. I'm not sure if you're trying to help or just trolling

Thanks, Mishtub! I didn't think of that until after I got some rest. I'll try to locate another firearm with a picatinny rail on top and install the Burris Fastfire III onto it.

I'll update once I kick the can further down the road.

 

I'd give Burris a call and see what their CS has to say. You might even go to a LGS and see if they have a different optic they will mount and check with a boresight for comparison.

 

Are you around San Antonio? I've got the same pistol. I would be willing to meet and let you try the sight on it.

 

Thank you for the kind offer, but it has been resolved. The Fastfire III was the culprit. I used a Savage Arms rifle with a zeroed in riflescope, put it in a benchvise, marked point-of-impact based on the riflescope AND laser boresight. Then, took off the riflescope and mounted the Fastfire III. It was off by exactly the same as it was on my 22/45. Maxing out the windage and elevation only gets me about half way Hopefully, Burris will make it right.

 

I know you said you have it figured out but I had the exact same problem but I then realized that the bolt that goes across the bottom of the fast fire mount wasn't dropping all the way into the slot in my rail so acouple seconds of dremel work to my rail and I put my Fastfire back on and stuck the bore sight back in the barrel and bingo couple turns of adjustment and everything lined up just fine

Thanks, DonReed!! I'll try some dental impression paper and see if mine is the same. But, 25+ MOA is a LOT of room to make up for. And, to be honest, after spending over $200 on a 1 oz piece of metal and glass, I expect it to not require modification . Plus, it would automatically void my warranty. I contacted Burris and they claimed that they've NEVER had this issue before After talking to a technician and a manager, I quickly realized that Burris is NOT the company I want to do business with. Fortunately, they were in a one-party notification state so the conversation will certainly go in the review video.

As for Ruger, they claim to be dumbfounded about the (recalled) pre-2006 hammer pivot pin in my post-2011 22/45 that caused my sear spring issues

At some point, "Made in the USA" becomes a liability. I think I've crossed that threshold.

 

Maybe I'm wrong but I thought some red dots, in general, are not supposed to zero at 10 or 15 FEET. I could not zero mine till I moved out to 50 feet. Anybody know about this for sure?

 

Well, this issue has become quite common. It's not exactly a "defect", but it is quite inept of Burris not to at least inform their customers that they may need to alter the mount to get it to fit some Picatinny/Weaver rails. Well, 4 months and a bit of filing later, I'm excited to finally take my 22/45 "avec Optics" out for a plinking session tomorrow.

Here is a link to just one of many discussions about modifying the mount.

burris fast fire on M&P 22

Eventually, Burris realized there was an issue...about 2 months AFTER I directly informed them.

Burris Fastfire III - 8moa - BIG DISAPPOINTMENT.... now not so much!

At the bottom, notice that "BurrisOptics" states:

"Hmmmm this is good to know. I wasn't aware they weren't fitting on some weaver mounts. I'll pass this on and see if we can get a fix for this. Not sure what can be done but it's worth looking into."

Anyway, I just wanted to let everyone know what the problem was and how to solve it.

Problem: Burris Fastfire III Picatinny Mounts don't fit all types of Picatinny/Weaver rails.

Solution: IF your Fastfire III doesn't sight in perfectly, take off the mount and file down the high ridge along the "cross screw". With that high point gone, the Fastfire III can sit completely on the top of the rail without see-sawing.

 

Thanks for the info..




Steve

 

That didn't take long to be threatened...post removed.

 

I will not be able to address the OP directly but I will report my findings to the other members that are having the same issue. My only concern is making sure we find the source of the issue and getting it resolved the best we can.

The link posted has nothing to do with what we are talking about here. The linked thread is referring to a Weaver fitment and not picatinny. The two are not the same and are not interchangeable. Luckily for us we are talking about picatinny which does have a specific standard.

Burris and Ruger have had a superb working relationship for well over 20 years and my contact at Ruger has been working with me on this to find the issue. Both companies are going by the standard 1913 Picatinny specs so somewhere we should find the issue. He was able to pull an early model of the 10149 and give me the direct measurements and here is what we came up with.

The picatinny specs for the cross slot are as follows:1913 Picatinny Rail Dimensions

depth = .118 (+/- .008)
width = .206 (+/- .008)

Early model 10149 factory supplied picatinny rail dimensions

depth = .124
width = .208

Burris picatinny mount dimensions

depth = .093
width = .160

As you can see, the mount should fit without any issues.

The question that we both had was about the specs of the current production rails that are being sent with the guns. Although he offered to walk the line and measure a rail I asked him to simply send me a rail and we could see first hand if there was an issue. I now have one on the way to me and should have it this week. I will pull a FF3 from stock and see what we run into.

If there are any other questions please feel free to post them or message me. I'd be happy to help in any way I can.

 

The 10149 picatinny rail showed up today and it most certainly is within spec. These are the measurements I get on the rail.

depth .125
width .210

I pulled a new base from a packaged FastFire 3 and these are the crossbolt measurements while in the base itself.

depth .105
width .152

The end result is that it fits and quite nicely.

I'm not sure what problem the OP was having but whatever it is hopefully he will figure it out. Unfortunately he'll have to figure it out on his own from this point on. For the rest of you, please feel free to contact me about any issues you may run into with our products.

 

I have a MarkIII and it shoots perfect I have a new 22/45 and I have tried two different red dot burris and a scope I cannot get this gun to stay on target at all if I did not love Rugers this gun would have sent me to never own one again. What can it be, it is not me my MarkIII my browning and all others shoot just fine with me shooting them