Take a look at this

[Crooked Stic]

Wear on the outer edge of the shelf pad. Shelf not cut to center.
   

[Trenton G.]

I have the same issue on my longbow. Not sure why, possibly arrows not being tuned?
I'll be watching this thread to see responses from those who know much more than I do.

[crazynate]

It happens with wider shelfs. My bob lee does it but it tunes fine so I don't worry about it.  One thing that did help me is switching to shorter feathers that weren't so helical. I got better clearance that way

[the rifleman]

I think it was ken beck that explained this was why black widows make their bow w fairly narrow shelves in the longer YouTube video on tuning.  Great video and explanation.

[kenneth butler]

I wouldn't have any qualms about taking the width of the shelf down but if you are not comfortable with wood work,keep working with the tune. Experiment with a softer strike plate and maybe bringing it out a tad. You can't go too much or you will need a lighter spine arrow. It would be good to know where your center line measurement is. You say it is not cut to center? What your bow weight and arrow spine and length are.  Good luck. Ken

I'm guessing your arrows are too stiff and you nocking point may be too low.

If neither of those is the issue, you may simply have to change your feather orientation; cock up, in, down or out.

So... what's your specs?

[longbow fanatic 1]

Originally posted by Jim Casto Jr:
I'm guessing your arrows are too stiff and you nocking point may be too low.

If neither of those is the issue, you may simply have to change your feather orientation; cock up, in, down or out.

So... what's your specs?

My thoughts exactly.

[kenneth butler]

I think you are right Jim. I got caught up in the shelf too wide thing and thinking his shooting was good just getting the shelf wear. I blew  it on that one,just wasn't thinking.     Ken

To my notion, you didn't blow anything, Ken. That shelf is indeed a wide one.  A fellow could have a decent (close) tune and the back of the arrow still wouldn't clear "that" shelf.  Raising the nocking point may help some.  Raising the nocking point won't make the arrow act any weaker, but, it may alleviate some contact on the shelf.

If I owned that bow, I'd probably shoot it off an elevated rest, or take a rasp and sandpaper to the shelf too.   8^)

[kenneth butler]

That would solve the problem but it looks like the OP didn't come back.     Ken

[Jackpine Boyz]

I had the same issue.  Now with my arrow tuning process I include aerosol athlete foot spray to the riser/arrow rest.  You'll see a similar rub line, I then rotate the cock feather until I get the a clean shot without disturbing the powder. My main long bow like cock feather between 11 and 12 o'clock rather than the textbook 9 o clock (when looking from behind/right handed.)  I agree otherwise that the shelf could be narrower.  Fletching size and helicals can also affect contact points if you're papertuned.