New Rem. 700 Classic (17 Rem.) Trying to determine max OAL for Berger 25 gr.
Book says 2.150"
Here is the method I used:
Cut end off new bore brush and ground flat on end. Screw this on 1 piece cleaning rod(coated of course). Insert carefully from muzzle end until it contacts bolt face. Slide a stop collar until it contacts muzzle and tighten set screw.
Remove bolt and insert a FL sized case with a bullet seated VERY long and press it into the lands. Re-insert cleaning rod until it contacts tip of bullet. Set second stop collar. Measure distance (outside to outside) of the 2 stop collars and subtract the thickness of the collar that referenced the bolt face.
Did this procedure 3 times and came up with 2.174" +/- .001. Seated a bullet to 2.170" and chambered the round. The bolt closed a little "hard". Extracted the round and it measured 2.150".
quote:Originally posted by jdllyons: Here is my problem:
New Rem. 700 Classic (17 Rem.) Trying to determine max OAL for Berger 25 gr.
Book says 2.150"
Here is the method I used:
Cut end off new bore brush and ground flat on end. Screw this on 1 piece cleaning rod(coated of course). Insert carefully from muzzle end until it contacts bolt face. Slide a stop collar until it contacts muzzle and tighten set screw.
Remove bolt and insert a FL sized case with a bullet seated VERY long and press it into the lands. Re-insert cleaning rod until it contacts tip of bullet. Set second stop collar. Measure distance (outside to outside) of the 2 stop collars and subtract the thickness of the collar that referenced the bolt face.
Did this procedure 3 times and came up with 2.174" +/- .001. Seated a bullet to 2.170" and chambered the round. The bolt closed a little "hard". Extracted the round and it measured 2.150".
What am I missing??
Posts: 687 | Location: Jackson/Tenn/Madison | Registered: 07 March 2001
quote:Originally posted by jdllyons: Here is my problem:
New Rem. 700 Classic (17 Rem.) Trying to determine max OAL for Berger 25 gr.
Book says 2.150"
Here is the method I used:
Cut end off new bore brush and ground flat on end. Screw this on 1 piece cleaning rod(coated of course). Insert carefully from muzzle end until it contacts bolt face. Slide a stop collar until it contacts muzzle and tighten set screw.
Remove bolt and insert a FL sized case with a bullet seated VERY long and press it into the lands. Re-insert cleaning rod until it contacts tip of bullet. Set second stop collar. Measure distance (outside to outside) of the 2 stop collars and subtract the thickness of the collar that referenced the bolt face.
Did this procedure 3 times and came up with 2.174" +/- .001. Seated a bullet to 2.170" and chambered the round. The bolt closed a little "hard". Extracted the round and it measured 2.150".
What am I missing??
First check to see if the same case without a bullet fits the chamber and the bolt closes easy....could be too long a case/too thick neck wall...other than that your method should work......also look at the setback bullet and see if the "marks from the lands" are long or square and that they are matching the lands in the barrel and equal around the bullet....also the OAL doesn't relate directly to the distance from the lands.....the bullets do vary in length..even in bergers and the only way to correctly keep the seating depth correct and consistant is with a ogive contact measurement such as sinclairs or stoney point..BUT your method should give a good starting point with that paticular bullet and using it to set up a good seater should give you good results.....I used to use a old steel rod and put masking tape on the rod and use a flat steel boxcutter blade to flaten aganist the muzzle and put ink on the edge and mark the tape with the bolt face and a bullet held in the bore and measure between the marks and got real close to later stoney point tool measurements...good luck and good shooting!!!
Posts: 687 | Location: Jackson/Tenn/Madison | Registered: 07 March 2001
