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Post by leftysixgun on May 14, 2019 21:36:24 GMT -5
When you guys are using the MiHa 385 (mine is actually 395gr HP and 415gr solid) which crimp groove are you using?
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Post by coldtriggerfinger on May 14, 2019 23:21:53 GMT -5
I've been using the top crimp groove. But that's just so far as I've got .
I don't know if I'm compressing the powder, but with H 110 I'de rather have a little compression than an air gap.
What is your alloy ?
My cup nose are 393- 395 gr and solids are 403-405 gr. As cast/ no gas check or lube.
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Post by leftysixgun on May 15, 2019 5:38:30 GMT -5
Straight wheel weights or I use 50%WW and 50% tape weights
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Post by bula on May 15, 2019 8:16:20 GMT -5
With that big HP,I've been using the lower, bottom cannelure. Am not looking for more performance,but due to early reports of lead rings left behind. Early on this was guessed to be from the thin ring separating the two cannelures getting sheared off by the crimp as the bullet started to move forward. Last time around, this was discussed some are saying its a chamber issue. But anyway, I've since only used the lower/bottom one. I haven't found any lead rings in my BSBH's but doubt I've shot a total of more than 50 yet.
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Post by leftysixgun on May 15, 2019 9:32:43 GMT -5
I have a few hundred thru mine and recently had the ball seat of the chamber recut to the more normal angle, not the steep 45* angle. I havent seen the lead ring since the cylinder was recut and Ive shot from both crimp grooves: Hopefully that eliminated the lead ring issue. Im taking it for another “walk” tomorrow and plan to shoot loads from both crimp grooves.
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Post by coldtriggerfinger on May 15, 2019 10:57:42 GMT -5
I think I have 1 or 2 really snug chambers in my cylinder. In the throat area. I thot It might be brass that was too long but that turned out to be not the issue.
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Post by coldtriggerfinger on May 15, 2019 11:10:54 GMT -5
That must be the weight difference .
I only have around 10% tape on WW.
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akbman
.240 Incinerator
Posts: 10
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Post by akbman on May 15, 2019 22:35:12 GMT -5
Send your cylinder to 2dogs, while he told me my 480 cylinder was nearly perfect and not recommended for any work, he did do a fantastic job on two 45 Colt cylinders I sent in, they are all now uniform in throat size.
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Post by coldtriggerfinger on May 16, 2019 0:24:46 GMT -5
Maybe this winter I can take it apart and send it off. I could have got a set of pin gauges last winter for a good price. Should have !
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akbman
.240 Incinerator
Posts: 10
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Post by akbman on May 16, 2019 6:38:14 GMT -5
I will say, I sent 4 cylinders, 3 were mine, one was a good friends, all of them were out and back in 7 days.
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Post by coldtriggerfinger on May 16, 2019 10:26:10 GMT -5
Wow, that's Fast. Real fast. I wonder if he can recut the leade like Lefty had done.
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Post by leftysixgun on May 16, 2019 12:37:16 GMT -5
This is Coldtriggerfingers quote from the Powder coating 101 thread....
”Some of us are very new to casting or lubing or sizing or powder coating. I still haven't got the powder yet.
Can't tell ya how much I appreciate threads like these. And all the work that goes into posting up all the pics .
Then too. These threads are good for the future. Like I recently found Hoover's thread on faster powders for the 480.
Thanks !!”
I dont know what powders you have on hand but 2400 and HS-6 has performed the best in my 5 shot 480 SBH. I touched 1200fps with the MiHa 385 HP and some 2400. The recoil was pretty stout to say the least.
So far I have found HS-6 and 1100fps to be the most consistent and I have been consistent with it aswell. I hope to be settling on a load soon. This gun has been a real chore here lately!
I guess is H110 doesnt build the pressure needed to group well yet. That is until you really start to pour in the powder. Maybe Ill go down that road a little later.
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Post by leftysixgun on May 16, 2019 18:16:12 GMT -5
Not quite sure why but my gun seems to shoot the MiHa 385HP better when I use the lower crimp groove. The groove that makes the OAL long. I did get a hint of sticky extraction with 19.0 of 2400 and the upper crimp groove
The lower groove with 14.5gr of HS-6 is still king. It averaged 1116fps and a spread of 16fps and a SD of 6. It was a ragged hole with one flyer. Im still getting used to this light trigger and let one go a little before I was ready.
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Post by coldtriggerfinger on May 16, 2019 20:55:53 GMT -5
The H110/296 is just a knee jerk reaction powder for me. It actually books out with a lower pressure for the velocity it gives.
Back when I was a poor tree thinner living out in the brush. Handgun powder was the same word as H110/296.
Tho I used about 5 different rifle powders for different rifles. Mostly 4198, 2230, 4320 and Rl15 . And 4831 for the 338.
Never had sticky extraction with 110/296 . Kindof idiot proof.
20 gr for 300 gr pills in the 44 mag. 22 gr for 300- 340 gr in the 45 Colt and 22.5 for 400 gr in the 480.
At 20' the loads were more accurate than I was.
Now that I started casting there is tons of stuff to learn and shoot thru my big 6 guns.
Right now, the only thing holding me back is getting the time to load and shoot more loads.
I need to order a Lee sizer die in 476 so I can put gas checks on. And one for 452.
Then I can try the HS6 powder. I've go enough of it to keep me shooting for quite a while. Good to know about seating in the rear cannalure on the 477/640 boolits.
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Post by leftysixgun on May 16, 2019 21:37:24 GMT -5
Heres 14.5gr of HS-6.....and of coarse the damn flyer I mentioned.  |
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