Needing Some Scope Mounting Advice

Rob404

Bronze supporter
AH legend
Joined
Jan 6, 2013
Messages
3,689
Reaction score
4,632
Location
Chaska Minnesota
Media
54
Hunting reports
Africa
2
Member of
NRA, Member Minnesota Horse and Hunt,,Caribou Hunt Club
Hunted
Illinois,Wisconsin,Michigan Limpopo Province South Africa
I really don't think a 2x10x42 is that far out of line for a 375HH , tell me what ring height You need and I'll see if I have a Burris Z with a Weaver mount laying around, a picture would help
 

Buckdog

AH enthusiast
Joined
Jun 9, 2015
Messages
488
Reaction score
711
Media
8
Hunting reports
Africa
1
weaver used to be great in the day, i have old ones that are awesome, not so much anymore, I would suggest that as someone else said with any off the shelf rings I would mount them and lap them, you will be surprised at how much they are out of round and dont line up. It is really easy buy the kit from brownells, you wont be sorry especially with a nice scope. A good custom gun maker usually laps rings. just drop a scope in a set of off the shelf rings and many times you are pushing it down in to bottom out or the top is squezing down as you tighten the screws thats not good lap those rings and she will drop right in with no stress on your optics. I own a firearms shop besides other things so I see lots of things and i have seen burris mount and scope failures including on my own weapon so sorry guys would never put another on my personal firearms, thats just one mans opinion. i will take leupolds and most of the european scopes all day any day and I lap the rings and mag mount the bases aka drill out tap and use bigger screws. please dont try and drill out and tap your gun yourself have a gunsmith do it!!!
 

uplander01

AH member
Joined
Nov 5, 2012
Messages
29
Reaction score
38
Member of
NRA, SCI
Hunted
Namibia, Mozambique, Canada (BC, Alberta, Saskatchewan, Newfoundland, Oueen Charlette Isl), USA Rocky Mountain Region, Alaska
Noticed the thread , thought I'd contribute.

Used to mount scopes all day long at retail level, probably mounted over 500 rigs. Not all rings and based are created equal as far as machining. Eliminate that first, try another brand. My advice, Talley, and his QR rings. This will give you easy access to your irons as well. Second, the scope type does not matter big or small, however, I would go with something smaller on a 375. Once you try some Talleys if you are having the same problem, try lapping , the first or second stroke will tell you how "off" your level you are. If its extremely far, make Winchester screw in a different barrel, been selling factory rifles for years, sometimes they just don't get those barrels in as straight as they should. A competent gunsmith could fix that as well but why not make the factory fix their mistake.

Good Luck-
 

30winmag

AH enthusiast
Joined
Jan 19, 2013
Messages
272
Reaction score
188
Location
Shelton, Nebraska, USA
Media
18
Hunting reports
Africa
2
Member of
NRA, SCI
Hunted
USA; Nebraska South Africa; Natal
had exactly your same problem on a win 70 supergrade with a leupold it it turned out to be a gun issue not rings or scope took it to a very good gunsmith and he just shimmed the back base done deal. that was many years ago and nary a problem since. way easy fix. and i agree with what someone else said I wouldnt use weaver rings with that scope on a 375 nor burris rings either both POS not befitting such a nice scope! warne, talley, leupold and some of the custom ring and base guys all good. 375 will recoil hard and stress a big scope and the rings and mounts and you want good ones when facing down a buff.

Thanks for the advice! I put it to good use.
 

30winmag

AH enthusiast
Joined
Jan 19, 2013
Messages
272
Reaction score
188
Location
Shelton, Nebraska, USA
Media
18
Hunting reports
Africa
2
Member of
NRA, SCI
Hunted
USA; Nebraska South Africa; Natal
weaver used to be great in the day, i have old ones that are awesome, not so much anymore, I would suggest that as someone else said with any off the shelf rings I would mount them and lap them, you will be surprised at how much they are out of round and dont line up. It is really easy buy the kit from brownells, you wont be sorry especially with a nice scope. A good custom gun maker usually laps rings. just drop a scope in a set of off the shelf rings and many times you are pushing it down in to bottom out or the top is squezing down as you tighten the screws thats not good lap those rings and she will drop right in with no stress on your optics. I own a firearms shop besides other things so I see lots of things and i have seen burris mount and scope failures including on my own weapon so sorry guys would never put another on my personal firearms, thats just one mans opinion. i will take leupolds and most of the european scopes all day any day and I lap the rings and mag mount the bases aka drill out tap and use bigger screws. please dont try and drill out and tap your gun yourself have a gunsmith do it!!!

I actually work with a guy who has a kit, it was a great borrow! Thanks for the advice.
 

30winmag

AH enthusiast
Joined
Jan 19, 2013
Messages
272
Reaction score
188
Location
Shelton, Nebraska, USA
Media
18
Hunting reports
Africa
2
Member of
NRA, SCI
Hunted
USA; Nebraska South Africa; Natal
No thanks:) But I can assure you I've done the same many times myself, when it became obvious that a different scope would be a much better fit for a particular rifle. The good news is, when you buy that next .270 or whatever, you will already have a fantastic optic that's a perfect match for it! See, I can rationalize anything.

Gee, how did you know I was buying another .270 before deer season? ;) Now I can buy the optic for my .375 and just swap out. Great minds think alike!
 

30winmag

AH enthusiast
Joined
Jan 19, 2013
Messages
272
Reaction score
188
Location
Shelton, Nebraska, USA
Media
18
Hunting reports
Africa
2
Member of
NRA, SCI
Hunted
USA; Nebraska South Africa; Natal
UPDATE: OK I lapped the rings, shimmed the rear base, zeroed the scope and boresighted. On at 25yds in 3 shots, 1.5" high at 100yds with two adjustments, hitting POA at 200. A little over MOA but some load development and practice will cure that. So it looks like the crisis has been averted for the moment, nwt to go hit the reloading bench and range a.k.a. the fun part! Thnks to everybody for all the good advice, I'll be sure to ask if I have any other issues. 4months 10 days and counting!
 

BRICKBURN

Super moderator
Contributor
Lifetime titanium benefactor
AH ambassador
Joined
Aug 5, 2010
Messages
22,981
Reaction score
17,470
Location
Canada
Media
412
Articles
23
Hunting reports
Africa
8
USA/Canada
2
Europe
1
Hunted
Namibia, South Africa, Botswana, Mozambique, Canada, USA, Mexico, England

Dwight Beagle

AH enthusiast
Joined
Mar 27, 2015
Messages
389
Reaction score
414
Location
Justin, Texas
Media
8
Hunted
US, Mexico and Argentina
Glad you got the issue fixed. I currently mount 30 to 40 scopes a week so I'll throw in my two cents. I will only shim a one piece base, front or rear. Shimming a two piece base stresses the scope tube because when you shim one base they are at different heights. Shimming a one piece base keeps the tube on the same plane, but on an up or down angle.
 

35bore

AH legend
Joined
Apr 17, 2009
Messages
2,402
Reaction score
877
Media
74
Member of
NRA,Missouri hunters ed, SCI, Owensville Gun Club, Quail Forever
Hunted
USA, South Africa, France
I have been away too long (recently back) for what it matters a tactical 20 moa pinnacy one piece rail might get you where you need to be. If stressing the scope may be an issue, just throwing it in there.
 

Royal27

AH ambassador
Joined
May 27, 2012
Messages
9,473
Reaction score
13,429
Media
109
Articles
5
Hunting reports
Africa
6
Member of
DSC, NRA, SCI
Hunted
USA - TX, CO, GA, ID. Africa - Zimbabwe, Zambia, and South Africa (Limpopo and EC)
Glad you got the issue fixed. I currently mount 30 to 40 scopes a week so I'll throw in my two cents. I will only shim a one piece base, front or rear. Shimming a two piece base stresses the scope tube because when you shim one base they are at different heights. Shimming a one piece base keeps the tube on the same plane, but on an up or down angle.

But lapping the rings would then overcome this issue, correct?
 

Royal27

AH ambassador
Joined
May 27, 2012
Messages
9,473
Reaction score
13,429
Media
109
Articles
5
Hunting reports
Africa
6
Member of
DSC, NRA, SCI
Hunted
USA - TX, CO, GA, ID. Africa - Zimbabwe, Zambia, and South Africa (Limpopo and EC)

35bore

AH legend
Joined
Apr 17, 2009
Messages
2,402
Reaction score
877
Media
74
Member of
NRA,Missouri hunters ed, SCI, Owensville Gun Club, Quail Forever
Hunted
USA, South Africa, France
I have been away too long (recently back) for what it matters a tactical 20 moa pinnacy one piece rail might get you where you need to be. If stressing the scope may be an issue, just throwing it in there.
Sorry, 20moa picatinny scope base. Dang auto correct.
 

Dwight Beagle

AH enthusiast
Joined
Mar 27, 2015
Messages
389
Reaction score
414
Location
Justin, Texas
Media
8
Hunted
US, Mexico and Argentina
If you shim the front or rear base of a two piece set, one ring is higher and one ring is lower than the other. The scope tube will be bent slightly when installed. Not much at all, just a tiny bit, but it is still flexed.

If you shim a one piece base, the rings are still the same height in relation to each other so there is no stress on the tube.

I'm trying to think of a better way of explaining this.
 

Dwight Beagle

AH enthusiast
Joined
Mar 27, 2015
Messages
389
Reaction score
414
Location
Justin, Texas
Media
8
Hunted
US, Mexico and Argentina
A picatinny base is perfect for shimming since it is one piece. Any one piece base is fine.
 

35bore

AH legend
Joined
Apr 17, 2009
Messages
2,402
Reaction score
877
Media
74
Member of
NRA,Missouri hunters ed, SCI, Owensville Gun Club, Quail Forever
Hunted
USA, South Africa, France
A picatinny base is perfect for shimming since it is one piece. Any one piece base is fine.
Dwight, just saying you can buy the picatinny with a built in 20moa "tilt" "no shimming " needed.
 

Dwight Beagle

AH enthusiast
Joined
Mar 27, 2015
Messages
389
Reaction score
414
Location
Justin, Texas
Media
8
Hunted
US, Mexico and Argentina
Dwight, just saying you can buy the picatinny with a built in 20moa "tilt" "no shimming " needed.

Misunderstood you. You are correct, a 20 MOA base should work if the rifle is shooting too low.

On another note, issues like the OP had are becoming more and more common. The culprit most of the time is sub-par receiver drilling, tapping, and machining. Sometimes it is a mystery. I have a Marlin 336 that wore a Burris Fullfield II 2-7x35 for a number of years. Scope worked great. Now that I can purchase several brands of optics at serious discounts I decided to upgrade to a VX-3 1.75-6x32. When I mounted the scope I didn't have enough windage or elevation. Had to shim the base and go to windage adjustment rings to make it work.
 

Forum statistics

Threads
37,389
Messages
713,323
Members
66,699
Latest member
GarlandBru
 

 

 

Latest profile posts

degoins wrote on Treemantwo's profile.
I have a like new VC .450 I might part with. I had it built in 2013 and it has served me well. Also have a VC fitted leather trunk case for it along with the plastic case it came with. I'll take 14000 for all of it.
Matt W wrote on Jody's profile.
Hi Jody,
I have been looking for ideas on the best way to display my European mounts from Africa. I came across some of your shield work and was wondering if you would be willing to make one for me? If so, please let me know the cost. I like the shield with the two spears that you built for a member years ago. Thanks.
cal pappas wrote on Mnelson2's profile.
Nelson. Is this message a PM format. I want to send you my email, but don't know if this is the cirrect way to do it. I'm at <pappas@mtaonline.net> Send me an email with your phone and I will call you about a skull I have. I went to school in Boston and am from Bernardston in the west part of the state. Moved to Alaska in 1984 adn never looked back.
BeeMaa wrote on Justbryan's profile.
Sold a Blaser scope mount to him. He was a pleasure to do business with.
BeeMaa wrote on 375Fox's profile.
Sold a Blaser scope mount to him. Was a pleasure to do business with.
 
Top