Yah , closing the bar rail won’t help wear , at best it’s a band-aid. Sounds like incorrect sharpening and/ or depth gage not set properly causing that issue. I’ve got bars with over 100cord on em and they are still gtg. Make sure chain and is sharp, depth gauge is set to spec and don’t try to “save” money skimping on bar oil and forget these “budget” bars that don’t last worth a crap. False economy ... Also don’t furget to flip bar to promote even wear. Works well like this here in WNY. In Tennessee.... all bets are off 🤣