TI25 magazines for Ruger 10/22 rifles and similar firearms have the patent pending ability to be adjusted for a precision fit in your receiver. Each mag is adjusted prior to shipping and should be ready to use. However, since individual guns have varying tolerances, your mag is capable of being adjusted to satisfy three different requirements: (1) Bullet Height, (2) Bullet Feed Angle and (3) Camber (left and right adjustment).

It may be necessary or desirable to adjust your TI25 mag for a more precise fit in your 10/22 for any of the following reasons:

1. to achieve a precision feed angle and ejector position;
2. to make the mag fit your gun based on variations in receivers;
3. to reset the magazine position after the screws have been previously “adjusted” and now the mag will not work;
4. to position the mag in relationship to other manufacturers’ receivers other than Ruger.

Adjustments should be made with the following conceptual understanding before beginning:

1. The magazine adjustment is similar in concept to leveling an appliance (such as a dishwasher). All four screws must always be in contact with the receiver. You never want to have a situation where only 2 or 3 are in contact and the remaining adjusting screws are not in contact.

2.Similarly, given that all 4 are in contact with the receiver, all adjustments are made in pairs. You would never adjust one screw. For instance, if you wanted the ejector to be farther to the right (toward the bolt), you would screw IN the two screws on the right hand side and screw OUT the 2 screws on the left hand side a corresponding amount. Picture a playground seesaw. When one side goes up, the other side has to go down.

3.Once the adjustment positioning is close per the SOP herein, adjustments are made in small increments, generally 1/2 to 1/3 of a turn. If you are turning and turning, you’re way off.

4.If you’ve already screwed the adjusting screws all the way in or taken them out, you’ll have to reset and then adjust them per the SOP herein.

5. If you adjust for hours turning screws in and out and in and out, it is possible to wear out the screw threads to the point that you will not be able to adjust them any more. The entire process of resetting the position and adjusting should take less than 15 minutes the first time by following this procedure step by step and only 2 to 3 minutes for subsequent mags once you understand the procedure.

6. If you are having difficulty, often it’s advantageous to have a shooting buddy help with the first one as you follow the procedure step by step.

7. For nomenclature in this SOP, all left, right, up and down descriptions are based from the shooters position as if the mag were in a rifle.

8. Once you get the magazine adjusted to fit your rifle, it should never have to be adjusted again.Depending on how tightly you have it adjusted, it may not however fit other 10/22 rifles depending on the receiver of each rifle.

9. If you over adjust the mag and have it too tight in your rifle, its possible to push the mag so far down that the bolt will not even pick up the round in the mag and will glide over it only scratching the bullet.

10. Some degree of play is advantageous and your initial adjustments should incorporate some play.The ability of the mag to wiggle in the gun somewhat will compensate for other factors and allow it to work.

11. Some “match” barrels are much more difficult to adjust for do to the lack of a chamfer or lead-in ramp for the bullet. Ruger factory barrels should all work fine.

Your TI25 magazine can easily be adjusted to fit your firearm using the following steps:

1. Remove the magazine from the firearm and ensure that your firearm is not loaded. Do not attempt to adjust the magazine using a loaded firearm.

2. Remove the barreled action from the stock by removing the barrel band and the single screw securing the receiver per the manufacturer’s instructions. The action must be out of the stock so that you can easily visually verify the position and contact of the adjustment screws on the receiver.

3. Screw all four screws down for clearance.DO NOT torque them down hard.You will strip them or break them off resulting in an un-usable mag. Be advised, that we will not replace mags that have been abused including breaking screws. Once the screws stop on their downward travel, stop.

4. Place the mag in the receiver.It should be wiggling left and right as well as front and back.You should have considerable play in all directions.

5. Our first adjustment is the ejector to the bolt distance. If you lightly push the bottom of the mag to the left, you can force the ejector on the mag against the bolt (which is too far).Correct adjustment is achieved by unscrewing the screws on the left side of the mag to make them taller until the ejector is in close proximity to the bolt but not touching. You do not want it to touch or drag on the bolt at all.You need some clearance between the two.Visually observe the screw heads against the receiver and make sure that BOTH are in contact with the receiver, and not just one.

6. Now when you lightly push on the bottom of the mag to the left, the screws should stop the travel before the ejector on the mag contacts the bolt, and there should be some clearance. Hold light pressure on the bottom of the mag and look at the right side. There should be a gap between the receiver and the magazine adjusting screws. Adjust the screws on the right side up until they are each about .003 from the receiver. You can use a piece of paper as a feeler gauge to set the clearance between the screws and the receiver.

The mag should now have minimal wiggle left and right and all four screws should equally be in contact with the receiver. Especially for your first adjustment attempt, do not try to adjust the mag so tightly in the receiver that it has no “wiggle” or play at all. Adjust using the .003 gap described.

7. The next adjustment is feed angle.Using dummy testing ammunition (available from Brownells), load 5 rounds into the mag. On the last round, put a small black El Marko dot on the back of the brass case at the 12:00 position. Insert the mag in the gun and chamber the first round.Manually eject it and observe the any scraping or scratches on the bullet or the case which will be indicative of possible adjustments.

If the bullet feeds well, you’re done. If it jams on feeding, you will have to adjust the feed angle which is easily accomplished by moving the two front screws up or down and moving the 2 rear screws the same amount in the opposite direction. For instance, if you want to increase the feed angle, take the two front screws down and the rear two screws the corresponding amount up. Adjustments should be in SMALL increments and all four screws have to be in contact when you are finished.

We have not yet found any factory unmodified Ruger 10/22 that the TI25 mag would not feed based on the mag's available range of adjustment. The TI25 mag adjustment range exceeds the total range available from any other after market high capacity magazine that we've measured.