F
43-287B
- Thread starter Brad
- Start date
F
freebullet
Guest
Used up 3 buckets(&2 stands) never had a handgun make it to sand, but have not shot full load 454 @ them yet. I don't pack it tight, just fill it.
Just scrubbed the revolver well. Decided to check the barrel too. Wow was she leaded up. I figure it was the .429 bullets that did it. Amazing to me that it was shooting as well as it was with the amount of lead present.
Gonna start using a dry patch after each session to check the barrel for lead.
Gonna start using a dry patch after each session to check the barrel for lead.
F
freebullet
Guest
Well, it was also sounding like the load was still to hot for the design. The ones you hp'd proved removing more weight reduced the top speed w/accuracy. Back then I think we were talking 19gr....i dunno....
Ian
Notorious member
Well, that and he wasn't getting anywhere near 120 thousand spinamathingies, which is the minimum for stable flight dontchaknow.
My M29 dotes on .4315" bullets....HEYYYY that's the size of the cylinder throats, how about that?
Brad, I think that revolver wants to shoot, and you're getting good enough at the bench to make it shoot. The fact that you're already getting 5-6" groups with bullets mangled beyond recognition and leaded gas checks is pretty amazing, imagine how well it will shoot if the bullet was true and the bore condition stayed consistent?
My M29 dotes on .4315" bullets....HEYYYY that's the size of the cylinder throats, how about that?
Brad, I think that revolver wants to shoot, and you're getting good enough at the bench to make it shoot. The fact that you're already getting 5-6" groups with bullets mangled beyond recognition and leaded gas checks is pretty amazing, imagine how well it will shoot if the bullet was true and the bore condition stayed consistent?
F
freebullet
Guest
T'was about 50mph on the hill @ our first job today. Ripped the door holder off the side door on our big box van.
I had to Jerry rig it open. Not a pleasant day due to wind.
I had to Jerry rig it open. Not a pleasant day due to wind.
Shot a few this AM. Tried the 287B with a deep groove on nose and some of the bullets Walter sent. All loaded in 445 brass with 21 gr H110 and CCI 350 primers.
Groups were nothing spectacular. Lots of vertical with both bullets. I hunk the load needs a little tweak to reduce that.
The 287B averaged 1287 and the 310 from Accurate went 1280.
I did recover a couple of the 287B and will get photos up soon. Nose groove alone isn't the answer.
Groups were nothing spectacular. Lots of vertical with both bullets. I hunk the load needs a little tweak to reduce that.
The 287B averaged 1287 and the 310 from Accurate went 1280.
I did recover a couple of the 287B and will get photos up soon. Nose groove alone isn't the answer.
Did a little checking. I turned a rod to .413, a slip fit in the bore but with little if any wiggle. I threaded the end with a 1/4-20 tap. I then made a small button at .431 with a male 1/4-20 thread on it.
Slip rod down bore and thread on button. It then can be pulled into the forcing cone and cylinder closed.
The button only entered 2 of 6 cylinder throats. The button also wouldn't enter one throats at all!
Seems the revolver has slightly off center throats at lock up.
Could the bullet nose be hitting the rifling when the rear is held in an off center throat? Bullet gets off kilter as nose hits forcing cone off center.
Could this be where the base smear is starting?
Maybe I need to not only mark gas checks but also index them on loading in case and chamber to see if there is a pattern to the smearing.
Not a hell of a lot I can do about it but it is an interesting thing to ponder.
Slip rod down bore and thread on button. It then can be pulled into the forcing cone and cylinder closed.
The button only entered 2 of 6 cylinder throats. The button also wouldn't enter one throats at all!
Seems the revolver has slightly off center throats at lock up.
Could the bullet nose be hitting the rifling when the rear is held in an off center throat? Bullet gets off kilter as nose hits forcing cone off center.
Could this be where the base smear is starting?
Maybe I need to not only mark gas checks but also index them on loading in case and chamber to see if there is a pattern to the smearing.
Not a hell of a lot I can do about it but it is an interesting thing to ponder.
358156 hp
At large, whereabouts unknown.
My first concern is the forcing cone too, but I seem to recall you're getting groups half this size with other bullets. You pic above makes me think the bullet is starting straight in the cone, but that goes away when the lube groove enters the cone. I've been following Dan's work on identifying the Paradox Effect, and I wonder if your bullet designs not manifesting Paradox by causing the base of the bullet to yaw unevenly as the lube groove collapses. This could also explain the leading you're experiencing over one side of the gascheck. You could still be left with a reasonably straight cylinder of lead because it would have no choice as it travels down the barrel. I hope I'm explaining what I'm trying to say somewhat clearly.