Post by Richard on Feb 2, 2017 19:32:17 GMT -5
So here is the module story……………
And a five shot group for my buddy schunter-Scott
First off, I put my 8x32x56 Sightron scope back on my HIS muzzle loader after having been back to Sightron for repair. They claim nothing was wrong with it??? Be that as it may? After getting it close to POA with three shots, the first three shot group……See Group #1 was .403”. The same load was shooting 1 ½ to 2” when I sent the scope out.
Group #2 was the same load with a scope adjustment and barrel properly fouled. It put five 300 gr. XTP’s in .473” at 100 yards. So, was it my imagination that there was a problem or did they fix a problem and “hedge” on the diagnosis? Whatever!
So, for group #3 I used a TRIPLEX load consisting of 5 gr. of Clays, 30 gr. of H-4198 and 40 gr. of 3031 under the same 300 gr. XTP for an average speed of 2647 fps with an ES of 45. The velocity was about where I guesstimated it would be and the ES? I was not sure just what to expect? It may be pressure starved and need an adjustment. What is interesting and one of the main reasons why it is imperative to shoot over a chronograph when testing is the group. If you look at shots # 1 and 2, they are a one holer? Shot #3 which is quite a bit slower goes out of the group a bit low………..then shots 3 and 4 pick back up some speed but are only 1 fps apart and they go into a one holer which kind of speads the group out to just under and inch. Without the chronograph and logging where each shot goes, all you have is the “group!” I look at an ES problem and try to figure out how to solve it?
Nest I want to go out to 300 yards with the 300 gr. AccuMax and Aero Max bullets so I fire one shot at 100 and see it hits ¾” low of the #2 group so I click down to it and set my turrets to zero. Now I run the elevation up 4 moa for 300 yards.
Group #4 300 AccuMax 5/67 duplex. First shot loads about the way I like it to feel and goes elevation wise right on the money only an inch and a half to the right…OK #2 loads fairly loose and drops a little in velocity but not bad…………well this shot goes high and about 4” to the left? #3 loads also loose but velocity is still right within the 14 fps ES and it goes off to the right to give me 5 ½’ group?
For group #5 I knurl three bullets for a tighter fit. Their velocity goes up somewhat but still has a 12 fps ES and they group in 3.5”
??
For the 6th. group I pull out a couple of 300 gr. AeroMax test bullets (same load) but their velocities are 62 fps apart with a 4” group. Som-ting Ain’t right?
Did the scope go south from just a few shots ago or what?
My attention goes to the modules. I have been observing the ends of the modules starting to deteriorate. I have also experienced (as Scat earlier mentioned) primer pockets loosening. My 100 yard shooting was with modules still in good shape while the 300 yard shooting was with modules that are getting raggedy. The thing is, I am not seeing much in the way of leakage back around the rest of the module? A few with very loose primer pockets have shown a little leakage around the primer. I had already retired those.
So here is what I am thinking……………some of this damage probably occurred when I was pushing 8 gr. of Clays as a the booster………..the past week I dropped it to 5 gr. but much of the damage had already occurred. I have PM’ed Hank and asked him to send me out (I want to start completely fresh) a New breech plug, a new .035” bushing along with some new modules and I will start shooting some of the single powder loads that others have had success with as the modules are just not holding up to the higher temperature/pressure produced by the Clays. I love the duplex and will continue to shoot it in my 209 rifle which has experienced no problem of primer leakage or bushing damage. We are in a world of experimentation ………..seeing what does and does not work? Hank had to upgrade his module material due to pressures produced by Cyclops and other members rifles. I don’t know if the harder modules will help with the heat pressure thing on the ends of the modules?..........maybe?...........they might just suffice for keeping the primer pockets tight? Time will tell.
And a five shot group for my buddy schunter-Scott
First off, I put my 8x32x56 Sightron scope back on my HIS muzzle loader after having been back to Sightron for repair. They claim nothing was wrong with it??? Be that as it may? After getting it close to POA with three shots, the first three shot group……See Group #1 was .403”. The same load was shooting 1 ½ to 2” when I sent the scope out.
Group #2 was the same load with a scope adjustment and barrel properly fouled. It put five 300 gr. XTP’s in .473” at 100 yards. So, was it my imagination that there was a problem or did they fix a problem and “hedge” on the diagnosis? Whatever!
So, for group #3 I used a TRIPLEX load consisting of 5 gr. of Clays, 30 gr. of H-4198 and 40 gr. of 3031 under the same 300 gr. XTP for an average speed of 2647 fps with an ES of 45. The velocity was about where I guesstimated it would be and the ES? I was not sure just what to expect? It may be pressure starved and need an adjustment. What is interesting and one of the main reasons why it is imperative to shoot over a chronograph when testing is the group. If you look at shots # 1 and 2, they are a one holer? Shot #3 which is quite a bit slower goes out of the group a bit low………..then shots 3 and 4 pick back up some speed but are only 1 fps apart and they go into a one holer which kind of speads the group out to just under and inch. Without the chronograph and logging where each shot goes, all you have is the “group!” I look at an ES problem and try to figure out how to solve it?
Nest I want to go out to 300 yards with the 300 gr. AccuMax and Aero Max bullets so I fire one shot at 100 and see it hits ¾” low of the #2 group so I click down to it and set my turrets to zero. Now I run the elevation up 4 moa for 300 yards.
Group #4 300 AccuMax 5/67 duplex. First shot loads about the way I like it to feel and goes elevation wise right on the money only an inch and a half to the right…OK #2 loads fairly loose and drops a little in velocity but not bad…………well this shot goes high and about 4” to the left? #3 loads also loose but velocity is still right within the 14 fps ES and it goes off to the right to give me 5 ½’ group?
For group #5 I knurl three bullets for a tighter fit. Their velocity goes up somewhat but still has a 12 fps ES and they group in 3.5”
??For the 6th. group I pull out a couple of 300 gr. AeroMax test bullets (same load) but their velocities are 62 fps apart with a 4” group. Som-ting Ain’t right?
Did the scope go south from just a few shots ago or what?
My attention goes to the modules. I have been observing the ends of the modules starting to deteriorate. I have also experienced (as Scat earlier mentioned) primer pockets loosening. My 100 yard shooting was with modules still in good shape while the 300 yard shooting was with modules that are getting raggedy. The thing is, I am not seeing much in the way of leakage back around the rest of the module? A few with very loose primer pockets have shown a little leakage around the primer. I had already retired those.
So here is what I am thinking……………some of this damage probably occurred when I was pushing 8 gr. of Clays as a the booster………..the past week I dropped it to 5 gr. but much of the damage had already occurred. I have PM’ed Hank and asked him to send me out (I want to start completely fresh) a New breech plug, a new .035” bushing along with some new modules and I will start shooting some of the single powder loads that others have had success with as the modules are just not holding up to the higher temperature/pressure produced by the Clays. I love the duplex and will continue to shoot it in my 209 rifle which has experienced no problem of primer leakage or bushing damage. We are in a world of experimentation ………..seeing what does and does not work? Hank had to upgrade his module material due to pressures produced by Cyclops and other members rifles. I don’t know if the harder modules will help with the heat pressure thing on the ends of the modules?..........maybe?...........they might just suffice for keeping the primer pockets tight? Time will tell.
