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BC estimates for these .32 cal bullets (Read 8906 times)

CajunRebel Oldtimer Offline Posts: 694 Location: Alexandria, VA Joined: Nov 18^th, 2007	Re: BC estimates for these .32 cal bullets Reply #15 - Mar 7^th, 2016 at 4:20pm	Print Post
	Geez Frank, thanks one heck of a lot. You seem to be right on the money. Except the weight is 208gr using 1:25 Rotometal alloy. Since it's a custom mold gonna call it the Hoch-frnkeore 322200.


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gunlaker Frequent Elocutionist Offline Posts: 2601 Location: lower mainland, B.C. Joined: Dec 13^th, 2010	Re: BC estimates for these .32 cal bullets Reply #16 - Mar 8^th, 2016 at 5:38pm	Print Post
	Thank you very much Frank. I'm surprised at how low the BC of the Hoch 32200D is. I will do more careful measurements this afternoon and post any differences. Chris.


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frnkeore Frequent Elocutionist Offline Posts: 7647 Location: Central Point, OR 97502 Joined: Jun 16^th, 2010	Re: BC estimates for these .32 cal bullets Reply #17 - Mar 8^th, 2016 at 7:54pm	Print Post
	The short ones. If I get conformation on all of dimension for these, I'll add them to the Bullet Design Sticky. Frank

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bwdog Participating Member Offline Posts: 34 Joined: Mar 8^th, 2015	Re: BC estimates for these .32 cal bullets Reply #18 - Mar 9^th, 2016 at 7:34pm	Print Post
	Frank Noticed the base on the Zischang bullet print . Can you comment on the type / purpose of that base design . tia bwgdog


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frnkeore Frequent Elocutionist Offline Posts: 7647 Location: Central Point, OR 97502 Joined: Jun 16^th, 2010	Re: BC estimates for these .32 cal bullets Reply #19 - Mar 9^th, 2016 at 8:18pm	Print Post
	I'm not sure on this bullet. The Elliptical area doesn't match very well. Elliptic's are based on two dimensions, X & Y and the profile of the pictured bullet looks more like a multi caliber spitzer, with a round nose but, it's not to far off. Chris, can you varify where the ogive starts on your bullet? Frank

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frnkeore Frequent Elocutionist Offline Posts: 7647 Location: Central Point, OR 97502 Joined: Jun 16^th, 2010	Re: BC estimates for these .32 cal bullets Reply #20 - Mar 9^th, 2016 at 8:27pm	Print Post
	bwdog wrote on Mar 9^th, 2016 at 7:34pm: Frank Noticed the base on the Zischang bullet print . Can you comment on the type / purpose of that base design . tia bwgdog Many of the old Ideals had that. It's a "starter" area to get it in the case. This is a Ideal, 25 cal. They use a little bit of the groove for it. I assume the Zischang would be the done like that, too. It predates the modern, bevel base. Frank

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CajunRebel Oldtimer Offline Posts: 694 Location: Alexandria, VA Joined: Nov 18^th, 2007	Range Testing Reply #21 - Mar 10^th, 2016 at 10:24am	Print Post
	Frank - just wanted to let you know I went to the range and used the BC data you provided. Fed info into my ballistics calculator & spreadsheet, adjusted tang sight from 100yd zero to 50yds (3.9 MOA down) - 3" bull, right on the mark for elevation. Yea - I HATE THE WIND!!! Thank you very much for your efforts.
	« Last Edit: Mar 10^th, 2016 at 10:29am by CajunRebel »

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frnkeore Frequent Elocutionist Offline Posts: 7647 Location: Central Point, OR 97502 Joined: Jun 16^th, 2010	Re: BC estimates for these .32 cal bullets Reply #22 - Mar 10^th, 2016 at 10:28am	Print Post
	CR, Your very welcome. Frank

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gunlaker Frequent Elocutionist Offline Posts: 2601 Location: lower mainland, B.C. Joined: Dec 13^th, 2010	Re: BC estimates for these .32 cal bullets Reply #23 - Mar 10^th, 2016 at 3:50pm	Print Post
	Hi Frank, Here are the corrections to the Zischang. I figured I'd post this one first as it's a historically interesting mold. Actually I have three, probably identical, that came with the rifle. They are all adjustable with a brass plug, each is set to a different length. I have only cleaned and used the longest mold. Interestingly the sprue plate is vented on the underside. The only differences I can see are that the lube grooves are very shallow ( 0.309" ) and, as far as I can tell, they are very close to square. Two bands are also different. I've marked them in the attachment. Chris.


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gunlaker Frequent Elocutionist Offline Posts: 2601 Location: lower mainland, B.C. Joined: Dec 13^th, 2010	Re: BC estimates for these .32 cal bullets Reply #24 - Mar 10^th, 2016 at 4:13pm	Print Post
	Frank here is the Brooks grease groove mold. It might not be worth saving in your library. It's a custom one I got Brooks to cut because the Hoch 322200D was undersized, and the Saeco 200gr was oversized, especially on the base. I goofed up and should have put less taper into the bullet. It fits my Badger barreled CPA not too badly, but the two bands closest to the nose are undersized and don't engrave. It fits my new CPA with the Douglas barrel better, but still no engraving on the band closest to the nose. I've only shot this bullet in the new CPA once as I only had a dozen or so on hand. On the rifles first outing with that barrel, after three shots to get sort of centered up, it put the next 8 into 0.9" high by 1.7" wide at 223 yards. I will tweak the dimensions a bit and get Mr. Brooks to cut a new one though. Chris.


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gunlaker Frequent Elocutionist Offline Posts: 2601 Location: lower mainland, B.C. Joined: Dec 13^th, 2010	Re: BC estimates for these .32 cal bullets Reply #25 - Mar 10^th, 2016 at 4:21pm	Print Post
	Now the Brooks paper patch elliptical one. On mine, the nose and shank have equal lengths. If I were to get another mold I would actually make it just like your drawing. I think the longer shank would be an advantage. I shoot this one breech seated with black powder and I think it bumps up a bit too much. Chris.


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frnkeore Frequent Elocutionist Offline Posts: 7647 Location: Central Point, OR 97502 Joined: Jun 16^th, 2010	Re: BC estimates for these .32 cal bullets Reply #26 - Mar 10^th, 2016 at 6:13pm	Print Post
	New drawings. The Ellipical looks better now. Frank

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gunlaker Frequent Elocutionist Offline Posts: 2601 Location: lower mainland, B.C. Joined: Dec 13^th, 2010	Re: BC estimates for these .32 cal bullets Reply #27 - Mar 10^th, 2016 at 6:57pm	Print Post
	Thank you very much Frank. Also thanks for enlightening me on the reason for the reduction in diameter on the base of the mold. Chris.


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