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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Tikka 300WM - want longer OAL
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<blockquote data-quote="DND" data-source="post: 860637" data-attributes="member: 29129"><p>Okay, pics and a hopefully explanatory tutorial - </p><p></p><p>The overall goal is to raise the shoulder and neck of the case in order to facilitate chambering instead of jamming a longer than SAAMI OAL 300WM round in a Tikka T3 action. Image 1 depicts me holding a casing in roughly the stock orientation of an un-modified AI mag on the left. Note how the body of the casing is roughly parallel with the magazine lips. The mag on the right shows how the casing now sits shoulder and neck high and will feed reliably in my action.</p><p></p><p>Image 1 - </p><p><img src="http://i582.photobucket.com/albums/ss261/DNDJeeps_Bucket/DSCN2643.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>The front (directly under bullet) of the stock AI magazine follower is limited in the height it can reach by two small tabs as depicted in image 2.</p><p></p><p>Image 2- </p><p><img src="http://i582.photobucket.com/albums/ss261/DNDJeeps_Bucket/DSCN2645.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>With these tabs bent up approximately 1/8" on mine, the front of the follower is now visibly higher than stock. In image 3 I am holding the follower on the left mag in roughly the stock position while the mag on the right is at the new raised height. Note the notch at the front of the follower on the right mag is visible for reference. No notch showing on the left mag.</p><p></p><p>Image 3 - </p><p><img src="http://i582.photobucket.com/albums/ss261/DNDJeeps_Bucket/DSCN2641.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /> </p><p></p><p>Now that the follower is allowed to travel to the height we want it, the new limiting factor for rounds is the magazine lips that retain the casing. By bending the leading 2/3 of the two lips outward approximately 1/16" each side the casing is now allowed to travel to the height the follower will go to under spring tension. This is harder to see, but in image 4 I am pointing with the screwdriver to the point where the lips start being bent outward, all the way to the front or upward in the image. The rear 1/3 of the lips are not changed which holds the case head in the stock position and properly oriented with the bolt.</p><p></p><p>Image 4-</p><p><img src="http://i582.photobucket.com/albums/ss261/DNDJeeps_Bucket/DSCN2651.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>Image 5 includes a casing to help see where the tapered bend of the lips begins.</p><p></p><p>Image 5-</p><p><img src="http://i582.photobucket.com/albums/ss261/DNDJeeps_Bucket/DSCN2653.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>All bends were accomplished with hand tools, specifically lineman's pliers while holding the magazine by hand.</p><p></p><p>I hope this helps anyone looking to run longer OAL in their Tikka T3 and I'll gladly address any questions to the best of my ability.</p><p></p><p>Cheers,</p><p>Dave</p></blockquote><p></p>
[QUOTE="DND, post: 860637, member: 29129"] Okay, pics and a hopefully explanatory tutorial - The overall goal is to raise the shoulder and neck of the case in order to facilitate chambering instead of jamming a longer than SAAMI OAL 300WM round in a Tikka T3 action. Image 1 depicts me holding a casing in roughly the stock orientation of an un-modified AI mag on the left. Note how the body of the casing is roughly parallel with the magazine lips. The mag on the right shows how the casing now sits shoulder and neck high and will feed reliably in my action. Image 1 - [IMG]http://i582.photobucket.com/albums/ss261/DNDJeeps_Bucket/DSCN2643.jpg[/IMG] The front (directly under bullet) of the stock AI magazine follower is limited in the height it can reach by two small tabs as depicted in image 2. Image 2- [IMG]http://i582.photobucket.com/albums/ss261/DNDJeeps_Bucket/DSCN2645.jpg[/IMG] With these tabs bent up approximately 1/8" on mine, the front of the follower is now visibly higher than stock. In image 3 I am holding the follower on the left mag in roughly the stock position while the mag on the right is at the new raised height. Note the notch at the front of the follower on the right mag is visible for reference. No notch showing on the left mag. Image 3 - [IMG]http://i582.photobucket.com/albums/ss261/DNDJeeps_Bucket/DSCN2641.jpg[/IMG] Now that the follower is allowed to travel to the height we want it, the new limiting factor for rounds is the magazine lips that retain the casing. By bending the leading 2/3 of the two lips outward approximately 1/16" each side the casing is now allowed to travel to the height the follower will go to under spring tension. This is harder to see, but in image 4 I am pointing with the screwdriver to the point where the lips start being bent outward, all the way to the front or upward in the image. The rear 1/3 of the lips are not changed which holds the case head in the stock position and properly oriented with the bolt. Image 4- [IMG]http://i582.photobucket.com/albums/ss261/DNDJeeps_Bucket/DSCN2651.jpg[/IMG] Image 5 includes a casing to help see where the tapered bend of the lips begins. Image 5- [IMG]http://i582.photobucket.com/albums/ss261/DNDJeeps_Bucket/DSCN2653.jpg[/IMG] All bends were accomplished with hand tools, specifically lineman's pliers while holding the magazine by hand. I hope this helps anyone looking to run longer OAL in their Tikka T3 and I'll gladly address any questions to the best of my ability. Cheers, Dave [/QUOTE]
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Tikka 300WM - want longer OAL
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