Originally Posted by woodnut
Encore, what's springboarding? And what is the HD locking bolt spring? I will double check the pin; but it shot great with the 20 TAC so I doubt that's it. I am positive the mount and scope are good. And yes, blue was used on the mount. All good advise from both of you!Thanks
Bear with me here.... its hard to concentrate, let alone type. But, in my moments of clarity with this flu, this does give me something to do other than moan and groan. Thank God, as I appear to have started to get over the hump.
Springboarding..... is a term that is used when a shooter's scope and mount moves at the precise moment of ignition and prior to the bullet leaving the barrel. This is most noticeable with long range centerfire shooters. With both the Encore platform rifles and the CVA Apex, this can be a problem. Its caused by the mount over lapping the taper on the barrel. Any minute amount of space between the front mount and the barrel...... MAY.... notice I said .. MAY.. be the cause or a contributing factor. Again, this has been most noticeable with centerfire shooters. Now.. as crazy as this may sound, this is what the professionals are discussing.
I had considerable conversation with Kurt Bellm about this concern, in which he informed me that to his knowledge, I was the first to bring this to their (Bellm) attention when shooting a muzzleloader. Again, this is something that the centerfire shooter's complain of. There are a couple things that can be done to correct it, if, it is actual springboarding of the scope. Some have added another ring to their mounts. Others send in their barrels and have additional mounting screws drilled and tapped.
Kurt also explained another concern that .... MAY.... cause vertical stringing. It has to do with a slight excess in the frame for the locking bolt. I'm to darn tired to remember exact wording but, when the locking bolt locks when the rifle is closed, it there's an excess amount of space, it can also create vertical strings by the slightest of movement. NOTICE........... this can be present in ANY break open rifle. Bellm has welded and re-ground these for a tighter fit.
I spent hours on the phone with Kurt and Barnes Bullets ballistics experts over this issue. I actually got a math professor involved, who proved that the locking bolt could definitely be the cause. I experienced the issue and couldn't figure it out. I was shooting 200yds and right to left, wasn't varying 1/2" but, I was getting 2" to 2.5" vertical strings and it was driving me completely nuts.
The locking bolt spring is located on your barrel above the hinge pin. The factory spring is somewhat light, which is why Bellm sells the HD spring. Its a bugger to do by yourself. You want that pin inside a towel when you tap out the pin holding it. If not......... you'll be looking for both and you certainly don't want anyone hurt. Its just as hard or harder to install the HD spring. There's two ways, one someone drives the pin into place while you're trying to hold it in or..... you can use a very small "C" clamp which works very well. Wear eye protection.