posted a message earlier today regarding using #11 caps with the 777 50 grain pellets and after the responses and some more reading I headed to the big hunting wonderland and picked up some 777 FFG powder to use with my #11 caps.
Anyhow I am using an CVA elkhorn magnum inline with the #11 caps but the caps must be struck twice before they fire. I have tried this probably 10 times so far. I get a good click on the first trigger pull and have a good dimple on the cap but it does not fire until I recock and sqeeze the trigger a second time.
right now the breechplug is in hand tight according to manufacturers recomendation. is there something else I should be looking at
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Did you have trouble with the caps going off before you went to the loose powder? This almost sounds like a spring or tension problem in the firing mechanism of the rifle. Also check and make sure the #11 nipple is not worn. It could be the first strike is setting the cap and the second strike is firing the cap.
A new nipple might be in order. Make sure you are seating those caps as solid onto the nipple as possible. In some cases I have heard of the caps being hard to seat all the way flush on the nipple. People have taken the #11 nipple, placed it in a drill, and using some emery cloth, turned the nipple down just a little so the caps fit better.
I am not aware of the kind of firing mechanism your ElkHorn has. Is this a bolt, or striker system? First thing I would do is clean this area real well and make sure it is not all gummed up with crud and oil. In some of the bolt guns, you have to make sure the hole that the firing pin comes through is free and clear and does not do anything to make the pin slow down.
In the hammer/striker guns, be sure that the slide area is nice and clean. Also check the spring and make sure that is all clean as well.