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Chrono results (Read 11245 times)

Kerz KCA Official Member Offline Krag Enthusiast! Posts: 307 Location: KY Joined: Jan 13^th, 2017 Gender:	Chrono results May 17^th, 2017 at 10:28am	Print Post
	I did some chrono work this week during break-in with my newly rebarreled 1898. Interesting results: Type Wt. Type Low High Avg SD ES #shots Horn 220 41.2 H4831 1951 2001 1970 18 50 6 Horn 220 40 IMR4350 1939 2209 2077 83 270 7 Rem 220 New Keenbore 2016 2381 2227 178 365 4

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Dick Hosmer KCA Official Member Offline Collector of Springfield Arms, 1865-1915 Posts: 1862 Location: Northern California Joined: Nov 20^th, 2005 Gender:	Re: Chrono results Reply #1 - May 17^th, 2017 at 2:32pm	Print Post
	Speaking of chronographs - does anyone know anything about old ones? I have a great piece of machinery, mostly brass, weighing probably 50# with some of the finest machining I've ever seen - do not think it is complete, but is fascinating. It's not accessible for photos just now. Marked Modern-Bond as I recall - electromechanical (VERY mechanical) in operation. I'm guessing 1930s, but could be earlier.


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Culpeper KCA Forum Member Offline Posts: 904 Location: Right Coast of Africa Joined: Mar 30^th, 2005	Re: Chrono results Reply #2 - May 17^th, 2017 at 2:39pm	Print Post
	Kerz wrote on May 17^th, 2017 at 10:28am: I did some chrono work this week during break-in with my newly rebarreled 1898. Interesting results: Type Wt. Type Low High Avg SD ES #shots Horn 220 41.2 H4831 1951 2001 1970 18 50 6 Horn 220 40 IMR4350 1939 2209 2077 83 270 7 Rem 220 New Keenbore 2016 2381 2227 178 365 4 What did your targets look like for the three? Which gave the better group

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reincarnated KCA Forum Member Offline Krag Enthusiast! Posts: 562 Joined: Mar 11^th, 2012	Re: Chrono results Reply #3 - May 17^th, 2017 at 4:07pm	Print Post
	Re the Modern-Bond chronograph. The 1941 edition of Phil Sharpe's Complete Guide to Handloading has a couple of photos of the chronographs of the day. Section is not in the more common 1937 edition.


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Dick Hosmer KCA Official Member Offline Collector of Springfield Arms, 1865-1915 Posts: 1862 Location: Northern California Joined: Nov 20^th, 2005 Gender:	Re: Chrono results Reply #4 - May 17^th, 2017 at 4:43pm	Print Post
	Thanks much. I have his classic work on rifles, but not the handloading one. Nice to know about the difference in editions, too.


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Kerz KCA Official Member Offline Krag Enthusiast! Posts: 307 Location: KY Joined: Jan 13^th, 2017 Gender:	Re: Chrono results Reply #5 - May 17^th, 2017 at 4:59pm	Print Post
	Culpeper wrote on May 17^th, 2017 at 2:39pm: Kerz wrote on May 17^th, 2017 at 10:28am: I did some chrono work this week during break-in with my newly rebarreled 1898. Interesting results: Type Wt. Type Low High Avg SD ES #shots Horn 220 41.2 H4831 1951 2001 1970 18 50 6 Horn 220 40 IMR4350 1939 2209 2077 83 270 7 Rem 220 New Keenbore 2016 2381 2227 178 365 4 What did your targets look like for the three? Which gave the better group It looks like the H4831 load (1.8 MOA) but I really need to do some more work. 100 and 200 yd data would be good. Will wait until I get an 1902 rear sight. It shoots way left about 4 MOA

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madsenshooter KCA Forum Member Offline Krag Enthusiast! Posts: 1079 Joined: Sep 10^th, 2009	Re: Chrono results Reply #6 - May 18^th, 2017 at 12:33am	Print Post
	Left as compared to the line of bore sighting, or left compared to some other load? Just curious as Poyer often wrote about people complaining the rifles shot to the left. I can't see that happening with a right hand twist. Oh, I can see sights not aligned properly, back before they had windage adjustment, but if there's any curve to the trajectory from the bullet's revolution, it ought to be to the right. Course, things are not always the way my head figures they ought to be. Hey, that old Kleenbore 220 was humping, bet the powder dried out over the years.


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Kerz KCA Official Member Offline Krag Enthusiast! Posts: 307 Location: KY Joined: Jan 13^th, 2017 Gender:	Re: Chrono results Reply #7 - May 18^th, 2017 at 9:59am	Print Post
	Yeah, they all shot left (testing at 70 yds). That would be left of bore sighting per se. The Kleenbore was really inconsistent as well RE velocity. Not sure about powder dried out but the bullets had bimetallic bonded to the case. I tried to pull some with Hornady collet puller. Damn difficult. Some wouldn't even pull. Just tried a few. A shame though, I was given 4 boxes. Vic

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butlersrangers KCA Forum Member Offline Krag Enthusiast! Posts: 6330 Location: Michigan Bi-Peninsular&Proud Joined: Oct 7^th, 2009	Re: Chrono results Reply #8 - May 18^th, 2017 at 12:42pm	Print Post
	'Kerz' - Try using Seating Die to push bullet into case, slightly, to break 'corrosive bond' between bullet and case mouth. Then pull bullet with collet or inertia puller. Polish bullets in vibrating Case Cleaner. Clean case mouths with brush & case lube and wipe dry. I would toss the powder. I suspect bullets bonded to case mouth or deteriorating powder may cause higher pressures and velocity in this old commercial ammo.


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Kerz KCA Official Member Offline Krag Enthusiast! Posts: 307 Location: KY Joined: Jan 13^th, 2017 Gender:	Re: Chrono results Reply #9 - May 19^th, 2017 at 9:37am	Print Post
	Yelp, very good point. I have done similar to break the seal on military ammo. Though it really had slipped my mind until you mentioned it. So went to the gun room and gave it a try on a few rounds. Damn, talkin' 'bout a bonding! The shoulder collapsed and bullets never moved.

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butlersrangers KCA Forum Member Offline Krag Enthusiast! Posts: 6330 Location: Michigan Bi-Peninsular&Proud Joined: Oct 7^th, 2009	Re: Chrono results Reply #10 - May 19^th, 2017 at 11:59am	Print Post
	Wow! I would have stopped after ruining One case, that way. Your Case Mouths look heavily crimped into Bullet Cannelure. I suspect that may be the actual problem. An inertia 'puller' would be worth a try. (I'd start with the five ruined ones)!


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reincarnated KCA Forum Member Offline Krag Enthusiast! Posts: 562 Joined: Mar 11^th, 2012	Re: Chrono results Reply #11 - May 19^th, 2017 at 5:12pm	Print Post
	Dick Hosmer wrote on May 17^th, 2017 at 4:43pm: Thanks much. I have his classic work on rifles, but not the handloading one. Nice to know about the difference in editions, too. Phil Sharpe's Complete Guide to Handloading is his magnum opus, far better writing & subject matter than "The Rifle in America" which has a lot of cut & paste from catalogs of the day. The 1941 edition is pretty rare. I have only seen one and I grabbed it. But there is plenty in the 1937 edition to interest anyone curious about Depression-era handloading. You could use the bearing from a Model A Ford generator to resize your .45 ACP brass. Drive the cases through with a 3/8" bolt and your hammer. Decap with a nail & your hammer. Re-prime with a wood dowel and your shop vise. IIRC, almost 2 pages of handloads for the Krag. The regular bound editions are very well made and not that hard to find. But the book is in the public domain and is on the web as a free download. All you have to do is search.


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madsenshooter KCA Forum Member Offline Krag Enthusiast! Posts: 1079 Joined: Sep 10^th, 2009	Re: Chrono results Reply #12 - May 19^th, 2017 at 6:10pm	Print Post
	Nice to know. I have a 41 Edition, signed June 19,1942. To Hugh J McKelroy, Warren PA. Keep shooting, Phil Sharpe. Fellow off Culver's with the handle of Ramon sent it to me after I sent him a model 92 sight.


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Kerz KCA Official Member Offline Krag Enthusiast! Posts: 307 Location: KY Joined: Jan 13^th, 2017 Gender:	Re: Chrono results Reply #13 - May 19^th, 2017 at 8:33pm	Print Post
	butlersrangers wrote on May 19^th, 2017 at 11:59am: Wow! I would have stopped after ruining One case, that way. Your Case Mouths look heavily crimped into Bullet Cannelure. I suspect that may be the actual problem. An inertia 'puller' would be worth a try. (I'd start with the five ruined ones)! We are kinda doubling up on this this threat but: I was just trying to bump the bullet back just enough to allow for removal. What I did find on the two that removed was excessive corrosion, No surprise, I'm sure. No sure a kinetic puller would do the job. Vic

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butlersrangers KCA Forum Member Offline Krag Enthusiast! Posts: 6330 Location: Michigan Bi-Peninsular&Proud Joined: Oct 7^th, 2009	Re: Chrono results Reply #14 - May 19^th, 2017 at 9:17pm	Print Post
	'Vic' - The 'inertia' puller worked for me, years ago, with some old French 8mm Lebel 1935 'N' machine gun rounds. Those bullets were heavily crimped and really tough to budge! It is worth a try to salvage those components.


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