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straycat Rookie Member
Joined: Dec 11, 2006 Posts: 3
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Posted: Sun Dec 17, 2006 6:53 pm Post subject: 243 load data |
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Does anyone have a manual that shows loading a 75 gr VMax with IMR 4064,IMR 4895 or Varget? My manuals shows a 75 gr HP but no VMax.
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Dawgdad Super Member
Joined: Feb 08, 2006 Posts: 1065 Location: On the Prairie
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Posted: Mon Dec 18, 2006 10:16 am Post subject: Re: 243 load data |
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From Chuck Hawks site: back her down a couple of grains and work up looking for signs of high pressure.
75 grain Hornady V-MAX bullet, 38.9 grains IMR 4064 powder, CCI 200 primer, Hornady case. MV 3,300 fps in 24" barrel. MAXIMUM LOAD! (Based on the Hornady Handbook, Sixth Edition.)
_________________ Alcohol, Tobacco and Firearms should be a convenience store, not a government agency... |
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SwampFox Super Member
Joined: Jul 15, 2005 Posts: 1040 Location: Destin, Florida
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Posted: Mon Dec 18, 2006 2:54 pm Post subject: Re: 243 load data |
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You might try this site:
www.imrpowder.com/
The 75 grain Hornady listed is the HP which is a hollow point, flat base, the V-max is a BT. However, the load data at the starting load level, would be the same. You should work up to your rifle's accuracy load just as normal.
Ed
_________________ The inherent vice of capitalism is the unequal sharing of the blessings. The inherent blessing of socialism is the equal sharing of misery.
-Winston Churchill |
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straycat Rookie Member
Joined: Dec 11, 2006 Posts: 3
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Posted: Mon Dec 18, 2006 4:44 pm Post subject: Re: 243 load data |
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Thanks guys.I appreciate it.
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PaulS Super Member
Joined: Feb 18, 2006 Posts: 4330 Location: South-Eastern Washington - the State
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Posted: Tue Dec 26, 2006 11:59 pm Post subject: Re: 243 load data |
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Sometimes a bt bullet will actually use more powder than a lighter bullet with a flat base. It kind of makes sense - there is less bearing surface rubbing the bore which means less drag and resistance. That would lead to less pressure with the same load. Not always and it is by no means a rule of thumb but it is true sometimes due to makeup of the core and the bearing surface friction of the boat-tailed bullet.
_________________ Paul
__________________
Speer, Lyman, Hodgdon, Sierra, and Hornady = reliable loading data
So and So's pages on the internet = NOT reliable loading data
Always check data against manuals
NEVER exceed maximum listed loads |
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TomTalker Rookie Member
Joined: Jul 29, 2006 Posts: 24 Location: SW Ontario
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Posted: Wed Dec 27, 2006 3:53 pm Post subject: Re: 243 load data |
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I'd try about 40gr Varget then sneek up on 42. Vardet is a perfect powder for the .243 case. I load 42gr in the 70grNos BT. 43 in the 65Vmax (one of my favorite loads) and 44gr with the 58Vmax. Varget is the best powder in my .243's/tt
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Vince Site Admin
Joined: May 25, 2005 Posts: 15704 Location: Brisbane AUSTRALIA
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Morax Super Member
Joined: Dec 18, 2006 Posts: 618 Location: Pittsburgh Pa
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Posted: Thu Dec 28, 2006 7:33 am Post subject: Re: 243 load data |
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are there any benifits going to the varget over the 414 from hodgdons? cleaner burner or close enough to be a whichever you have on hand?
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SwampFox Super Member
Joined: Jul 15, 2005 Posts: 1040 Location: Destin, Florida
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Posted: Thu Dec 28, 2006 8:10 am Post subject: Re: 243 load data |
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In my discussions with the folks from Hogdon they contended that H-414 was the very best in the Hogdon line for 22-250 case capacity cartridges. I have found that H-414 is also extreamly accurate with the 243 and the 260. The best groups in both cartridges, with several different guns, produce numbers in the sub .20 range at velocity numbers that are quite respectable. But you should try the powder and load combinations for your rifle, your results may be the same or different.
Ed
_________________ The inherent vice of capitalism is the unequal sharing of the blessings. The inherent blessing of socialism is the equal sharing of misery.
-Winston Churchill |
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Dawgdad Super Member
Joined: Feb 08, 2006 Posts: 1065 Location: On the Prairie
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Posted: Thu Dec 28, 2006 12:56 pm Post subject: Re: 243 load data |
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This is a very timely thread as I am working up a 75 gr. Sierra varminter bullet load for my .243 using H-414. Early scout loads look to have good accuracy potential and suitable velocity with 44-45 gr of H414.
I saw this with my 58 gr. V max load too that backing off of the max load by a couple of grains gave better groups with H414.
_________________ Alcohol, Tobacco and Firearms should be a convenience store, not a government agency... |
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TomTalker Rookie Member
Joined: Jul 29, 2006 Posts: 24 Location: SW Ontario
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Posted: Thu Dec 28, 2006 5:09 pm Post subject: Re: 243 load data |
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I used 414 almost exclusively befor Varget came along. The Varget seemed to give me better groups with the lighter bullets and more consistantly. Not much better though. Before VMax bullets I loaded 75Hornady HP's and Speer 75HP's with max loads of 414. Ilearned also that 414 slows down in cold weather. I'd read of this phenominon for years but never really saw it until I started doing tests with loads of 414 while comparing them with loads of Varget. The 414 loads were much lower velocity than loads Identical that I tested in summer. Haven't noticed this with Varget. Also had some excellent accuracy with H450 and the 75Hornady HP. .156" @ 100yrds. Used IMR 4064 too but settled on 414 untill Varget came along. 85 Sierra BTHP worked great with IMR 4350 too./tt
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SwampFox Super Member
Joined: Jul 15, 2005 Posts: 1040 Location: Destin, Florida
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Posted: Fri Dec 29, 2006 6:27 am Post subject: Re: 243 load data |
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Tom,
Do you recall the aprox temp where the slow down occoured, 30s, 20s, etc? I have not seen this, but then again, we do not see much in the way of severe temprature drops either.
The reverse of what you report would be blown primers in heat after developing loads in the cold. So reduced pressures due to cold temps would be something to watch for.
Ed
_________________ The inherent vice of capitalism is the unequal sharing of the blessings. The inherent blessing of socialism is the equal sharing of misery.
-Winston Churchill |
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TomTalker Rookie Member
Joined: Jul 29, 2006 Posts: 24 Location: SW Ontario
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Posted: Fri Dec 29, 2006 3:14 pm Post subject: Re: 243 load data |
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GOOD POINT! If I was loading up untill I saw pressure problems in a cartridge when it was cold and snow on the ground and then kept that load and used it come July on chucks with a change from minus to way above it could sure cause some trouble. Without looking it up I'll try to remember that I was loading 47gr of 414 with the Speer 75HP. Can't remember the temperature but there was definately snow on the ground. As I recall there was close to 100fps change from the loads I'd chronyed in the summer for chuck shooting. They showed no pressure problems at that time and were very accurate. That was purty much my chuck load for several years.
Very good point and a warning for us guys in cold country who are playing with load developement outside the written manual . Doing that very thing this weekend hopefully with my 22/284 with some lighter bullets and possibly faster powder. A Max load this week when its -5 or -10 degrees C just could be a dangerous one next August when its over 30C
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d_hoffman Super Member
Joined: Feb 13, 2007 Posts: 696 Location: Chillicothe, Ohio
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Posted: Tue Mar 06, 2007 8:15 pm Post subject: Re: 243 load data |
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Hornady has changed data on the 105gr A-Max Moly. It requires a 1 in 9 or faster twist, according to thier site.
_________________ The best form of gun control...aim straight!!! |
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