Weird range day with powders

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cowboy77

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i hadn't loaded for my 44 rifle until this week. I used some 240 grain xtp to start with. Carbine rifle. I started low and went to high using H110 with the bullet. Found out best groups were within a few tenths of max load. I had also loaded up some plinking rounds with barely more than minimum charge of HS6 and they shot completely over my targets at 100 yards but felt recoil felt like a 22 rifle. Any explanations. Same bullet. But poi 2 foot higher with weaker charge. Wish I had chrono graphed.
 
barely more than minimum charge of HS6
poi 2 foot higher with weaker charge

2 feet is a lot. There may be something else going on.

Light loads, ball powder and standard primers, really dont go well together. Add in a long carbine barrel, may stick a jacketed bullet in the barrel?

chrono, great idea for the next range trip.
 
I'm taking chrono. I'm through with the lighter loads though. I'm sticking with the H110. I wasn't worried about the squib as I could see the bullet impact the bank above the target.
 
I'm going with the idea that the increase in dwell time is why POI is so much higher. I'm gonna guess that the difference in velocity from a just above min HS6 load and a almost max load of H110, is probably going to be around 350FPS. Even the minimum HS6 load, should not give any danger of a squib, even in a carbine.
 
For light loads I would suggest a cast bullet over trail boss. As a bonus, it makes it real easy to tell which load is which by bullet type.
 
Part of the issue with pistol caliber carbines is, one generally shoots them at a distances greater than most folks shoot their handguns. Those slight differences in POI over POA is much less @ 20 yards than it is @ 100. To me, my handgun caliber carbines(both the levers in .357 and .44 and my 77/44) have recoil with hunting type loads that are not a detriment to pleasant shooting. Once I find a good accurate hunting load, I only download it slightly for everyday range shooting. That way I do not have to change my sights or scope from my 100yard POI to still hit targets consistently @ 40. Going from full bore magnum type loads to mouse fart loads in my handgun caliber carbines tends to change(for me anyway) POI enough that I feel obligated to change the sights/scope....and I don't like doing that, especially just to save a few cents per round on powder cost. The coupla dollars more per range day shooting hunting type loads, is not anymore than the cost of ammo to resight the guns for hunting.....IMHO. The exception is my .357 lever. I have some reduced 125gr projectile loads that shoot pretty close to the same POI as my 158 gr hunting type loads. Thus, for my grandkids(5/7/10) I make loads that they can shoot all day. I was told by an reloading mentor years ago that to make sure I don't stick a bullet in my carbines, that I always use a published load recipe that gives more than 850fps in a revolver. Has always worked for me. I also tend to stick with jacketed bullets for the carbines that share ammo with their revolver counterparts, since the long guns spec differently that the handguns. Ain't really found a lead load that shoots as well as jacketed in the 77/44 anyway.
 
The reason for lighter loads with hs6 was I was using cast with no gas check. The xtps I ran close to full throttle. Didn't have a lot of load info on the cast so used what I could find but safe. Going to stick with jacketed.
 
Barrel harmonics. Also, heavier bullet going slower has a longer barrel transit time resulting in bullet exiting after rifle has begun to rise due to recoil. Solution is to increase velocity.
 
No reason to abandon the lighter cast bullet loads using HS-6. IMO that is a good combination for a lighter practice load. You might have to increase the charge a bit to bring the bullet down and be sure to use a magnum primer and stiff crimp just like with H110. You will be fine, no reason to stop shooting the lighter loads.
 
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