375 Ruger Guide Gun Issues

[375 Ruger Fan]

Did you bore sight ?

I usually mount scopes and bore sight in my kitchen. With the rifle sitting on a cradle, I point the barrel down the hallway towards the back door. I place an orange target dot on the edge of the door, usually just below the door handle. With the bolt removed, look through the barrel. Move the sticky orange dot so that it is centered while looking through the barrel. The vertical line of the door is used to align the vertical cross hair in the scope. Adjust the cross hairs on the scope so that they are on the orange dot too. The rifle and scope are now bore sighted and should be reasonably close when you shoot at 25 yards to range test it.

 

[Hififile324]

Good luck and good shooting!

 

[LSTIEN458]

So I have recentered the reticle using the mirror method I made sure to go past center and back to center the scope tracks as it should. I have also remounted the scope using the same Ruger rings mounting the bases first putting forward pressure on them and tightening and loosening them slowly as they were torqued to 30in lbs. I then put the scope in the rings making sure I didn’t mix up the caps and screws. I leveled the gun and scope and evenly tighten the screws to 20in lbs. I will hopefully be able to go out tomorrow and see where it shoots.

Well I shot it this morning at 50 yards and the rifle was shooting 21.5” left and 6” low. I adjusted the scope 45 clicks to the right and 12 Clicks up and fired again hitting 16.5” left and 4” low. So it looks like the scope is tracking well and the rifle shoots consistent. I would need another 120 clicks left and another 24 clicks up. The elevation seems normal to me but the windage being off this far has me stumped. Thinking about trying a new scope next but I truly doubt that is the issue. Starting to think it is either in the rifle or rings. Any advice or help is appreciated.

 

[LSTIEN458]

Well I shot it this morning at 50 yards and the rifle was shooting 21.5” left and 6” low. I adjusted the scope 45 clicks to the right and 12 Clicks up and fired again hitting 16.5” left and 4” low. So it looks like the scope is tracking well and the rifle shoots consistent. I would need another 120 clicks left and another 24 clicks up. The elevation seems normal to me but the windage being off this far has me stumped. Thinking about trying a new scope next but I truly doubt that is the issue. Starting to think it is either in the rifle or rings. Any advice or help is appreciated.

Just so you not guessing 50 yard shot scope is 1/4 moa per click

 

[Papa72]

That must be a scope issue. Ruger rings and integral base are pretty bulletproof and a factory defect in either would be very obvious once your scope was set into the lower ring halves. I took my Vari-X iii off a Mark X and mounted on my Guide Gun (factory Ruger rings) and the scope only needed 3 clicks of elevation to zero. Yesterday, I dismounted that scope & remounted on the Guide Gun with Alaska Arms QD rings and no scope adjustment was required at all.

 

[Papa72]

Do you happen to have a laser line level? You could set that rifle in your cradle and align the laser with the front and rear iron sights then see if the line perfectly centers the rifle’s scope mounting receiver cuts. If good, mount the ring bottom halves and reshoot the laser line. If still perfectly centered, it’s a scope issue.

 

[LSTIEN458]

That must be a scope issue. Ruger rings and integral base are pretty bulletproof and a factory defect in either would be very obvious once your scope was set into the lower ring halves. I took my Vari-X iii off a Mark X and mounted on my Guide Gun (factory Ruger rings) and the scope only needed 3 clicks of elevation to zero. Yesterday, I dismounted that scope & remounted on the Guide Gun with Alaska Arms QD rings and no scope adjustment was required at all.

Ok this issue is starting to looking like a rifle or ring problem. I put the scope onto a Remington 700 30-06 after centering the reticle again and the first shot was 2” left and about 1” high at 50 yards clicked over 8 and second shot was just above the bullseye. I then moved back to 100 yards and shot a 1.5” 5 shot group with Remington corelok off the shelf ammo. I am ruling the scope out now what to do next??

 

[LSTIEN458]

 

[pilar]

O

Thread 'Alaska arms rings issue on ruger'

Apr 13, 2021

I just put the Alaska Arms 43/53 rings on my Swaro Z6i on my Ruger .375 Alaskan. Everything seemed fine, but I topped out the Swaro elevation and was still 1/2" low at 100yards. The scope was perfect on my 30-06, with lots of elevation left. Anyone else have this problem or a solution? The Ruger receiver scope base does not allow for any type of a 20 MOA adjustment that I can tell, but Ideally I would want to come up 25 MOA to get to the middle of my Swaro range. I appreciate any ideas!

• ORFish
• Replies: 18
• Forum: Hunting equipment, gear & optics

I would consider letting ruger taking over the problem solving

 

[gbflyer]

Send it back. Bummer.

 

[LSTIEN458]

Send it back. Bummer.

I believe this is the route I'm going down now. Will update as I learn more.

 

[Papa72]

Try installing just the lower ring halves and re-laser.

 

[LSTIEN458]

Try installing just the lower ring halves and re-laser.

 

[Papa72]

Sure doesn’t look like the ring base slots in the receiver or the rings were machined wrong from Ruger. A scope should mount and zero normally from what I am seeing. Your scope shoots fine on another rifle….I’m stumped!

 

[375 Ruger Fan]

@LSTIEN458 unless I missed it, I don’t see where you bore sighted the scope. It appears to me that you installed the scope and then went to the range and test fired. Am I missing something or misunderstanding what you did? Looking through the barrel or shining a laser pointer through the barrel to a wall or door 20-30 feet away, and then comparing the sight picture of the scope is a proper bore sighting.

Before shipping the rifle back, you might try another scope if you have one handy. Although it does sound like a rifle or rings problem. Another option is take it to a gun store or gunsmith and see if they can get it bore sighted.

 

[LSTIEN458]

Sure doesn’t look like the ring base slots in the receiver or the rings were machined wrong from Ruger. A scope should mount and zero normally from what I am seeing. Your scope shoots fine on another rifle….I’m stumped!

Me too I have never had trouble like this before.

 

[LSTIEN458]

@LSTIEN458 unless I missed it, I don’t see where you bore sighted the scope. It appears to me that you installed the scope and then went to the range and test fired. Am I missing something or misunderstanding what you did? Looking through the barrel or shining a laser pointer through the barrel to a wall or door 20-30 feet away, and then comparing the sight picture of the scope is a proper bore sighting.

Before shipping the rifle back, you might try another scope if you have one handy. Although it does sound like a rifle or rings problem. Another option is take it to a gun store or gunsmith and see if they can get it bore sighted.

Tried another scope I had to take off a different rifle last night that was zeroed on it. After centering the reticle in that scope which was barely off of center. The rifle still shot 20” left.

 

[Hififile324]

It looks like you have solved the scope issue, and the scope appears to be OK. Check your muzzle crown. A bad crown can lead to serious accuracy issues.

I would also buy a set of aftermarket Ruger ring/mounts, such as Leupold, Talley, Warne, and try those. See if it is a ring/mount problem.

 

[Papa72]

Another idea: Are you shooting with the muzzle brake? If so, take it off and try again with just the thread protector installed.

 

[Mark Biggerstaff]

Send it to Ruger, your barrel is probably not true to receiver. I just sent back a Left hand African 375 Ruger for a customer for the same issue. Barrel was not true in receiver. Ruger put a new barrel and shoots great. If it's man made things slip thru QC at times.