An interesting thing happened with my new rifle and Iím not sure what to make of it.
I just bought a TC Encore Pro Hunter with a 25-06 Remington barrel. So I get out my Hornady Lock-n-Load O.A.L Gauge with the 25-06 threaded case. I insert a Nosler Partition 115 grain bullet and insert it into the chamber.
I have cleaning rod inserted into the barrel so I can push the bullet back and get a good feel for where the bullet touches the lands. So after a little back and forth and double/triple checking I get a measurement (using a Lock-n-Load bullet comparator on a digital caliper) of 2.882Ē.
Thatís an OOAL of 2.882Ē Ö Ogive Over All Length.
When Iím pushing the bullet forward with the O.A.L gauge I feel absolutely no resistance until the bullet stops all forward travel.
That has the bullet so far out of the case mouth that it just tumbles out of the case. Obviously canít do a load with that. Itís just outrageously long. I tried it a couple of more times and get the same measurement.
Iím using Noslerís loading data so I decide to put together a dummy round to their specified COAL, which is 3.250Ē. I do that and measure it with my Comparator and I get an OOAL of 2.753Ē.
I then put that cartridge into my rifle and try to close the action. Surprise! It wonít close. Well, it closesís but it wonít lock. I have to force it to lock shut. I take out the cartridge and there are marks on the bullet where the lands have pushed against the bullet.
I measure it in the Comparator and itís now 2.740Ē OOAL! I put it back in the rifle and do the same thing again and it shrinks again. Now itís 2.735Ē OOAL Ö which turns out to be as small as it gets.
So what Iíve learned is that the maximum cartridge length (measured to the bullet ogive) for my rifle with that bullet is 2.735Ē OOAL which is 0.147Ē shorter than the O.A.L. Gauge was telling me.
Has anyone else used the Hornady O.A.L Gauge on a break-action rifle? Have you had similar results?