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Post by Deleted on Sept 3, 2016 5:03:19 GMT -5
I re-read the first few exchanges of conversation between Scat and Hank and get the point on the .040" bushing letting more pressure back to the module. Now maybe I would be defeating the purpose of the HIS system if I went with one of my .026" bushings and lets say.........a plain ole' LR primer (delete the magnum) and yet still use the duplex to get a "better" burn or better accuracy? Not saying it will but it could? I say this because my duplex loads have proven fairly accurate and have been giving me, by and large, pretty good ES's? Which could be attributed to an efficient burn on the powder. So, yes, lots of stuff to play with. BTW, just finished up another HIS install on one of Jonathan's rifles. ( I had picked up two plugs and modules for him at the spring shoot?) He had a friend and gunsmith install the first one but the guy takes too long. I turned his second one around in three days! Plus, he had bought the taps and counter bore which I got to use on mine. Richard, there is another element at play with this system. The recess in the plug holds 5gr of powder. A fast booster like clays makes too much pressure in that small area. The overall load pressure is ok but the initial pressure spike is where the problem lies. I had not been duplexing before that incident except when I first installed a repair plug (HIS replacement for another system) in a pacnor I brought to the spring shoot. At that time I duplexed with 4759. Some of those modules no.longer hold a primer. They measure .002 or so oversized on the major OD. I think the optimum bushing size is .035 because as we know, the lrmp has more heat but less pressure than a 209. Just a theory but you could put two .035 bushings back to back which would lessen the volume of the plug recess and possibly allow the use of boosters. I am happy with the system exactly as it is. |
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Post by Richard on Sept 3, 2016 14:21:23 GMT -5
Your probably right, but being who I am, I have to play:) You know the story of "Doubting Thomas?" If I find that the single loads are shooting as accurately as the duplex, I am not against conforming? A few years back with the Savage .50's, everyone was shooting singles and for the most part, accuracy was S--t! A couple of guys starting duplexing...........then I got involved with duplexes, then we went to the .45's and I continued duplexing and modifying my duplex's and the next thing you know a lot of people started duplexing and have good results also so...............what I am saying is that I will probably play a bit with it. I understand what you are saying about the chamber in the BP so maybe a slower booster or a smaller bushing hole? Hank will spot me some bushing if I bulge them  If no one experimented we would still be using "Atlatls" instead of compound bows? |
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