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kfhutc
HB Full Member
| Joined: | 16 September 2008 |
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| Posts: | 5 |
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Posted: 17 September 2008 09:35 PM |
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I know some primers are "hotter" than others, but what effects, if any do these typically have on muzzle velocity and/or pressures? I'm interested in magnum primers. I usually use Fed 215 with my 300 UM and 300 SAUM loads, but recently fired identically powder charges using CCI magnum primers and experienced a higher average fps, but also more inconsistent chrono readings. Obviously I've never experimented much with various primers.
I appreciate any input. Thanks
Kevin
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72coupe
Handloading Master
| Joined: | 11 June 2006 |
| Location: | Iowa Park, Texas USA |
| Posts: | 1546 |
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Posted: 18 September 2008 12:15 AM |
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You will just have to experiment to find those answers. When ever I work up a load, I always run a primer series to find which primer gives me the best group.
The results can be surpriseing. Because of these test the Remington 9 1/2 has become my favorite large rifle primer and the Remington 6 1/2 usually gives me the best groups.
However I don't use the 6 1/2 much anymore because of the problems with some lots blowing a pin hole in the radius on the bottom of the primer. This sends a hot jet of gas onto your bolt face and removes a divot of metal.
____________________
Reloader since 1969.
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Paul Tummers
HB Life Member
| Joined: | 18 June 2007 |
| Location: | Berg En Terblijt, Netherlands |
| Posts: | 337 |
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Posted: 18 September 2008 10:49 AM |
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I must say, I never ever have been thinking much about the differences in primers of different brands- I am lucky already when I can get primers at all, which means mostly CCI for me!
Same goes for different brands of powder; I am doomed to stay on using Vithavuori and limited Accurate powders, and be happy with it-because this is what is available.
____________________
There almost always is a way to do things better, more often than not by simplifying.
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72coupe
Handloading Master
| Joined: | 11 June 2006 |
| Location: | Iowa Park, Texas USA |
| Posts: | 1546 |
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Posted: 18 September 2008 03:04 PM |
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| I know what you mean by limited choices Paul. I can only get 4 varieties of Remington, Winchester, CCI, Federal, Wolf and Chedite primers.
____________________
Reloader since 1969.
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kfhutc
HB Full Member
| Joined: | 16 September 2008 |
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| Posts: | 5 |
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Posted: 18 September 2008 04:27 PM |
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| Thanks for the input. I've never tried Remington 91/2's, just Federal 215 and CCI. I'll run some of my own tests and see what difference it makes.
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wheezengeezer
addicted handloader
| Joined: | 16 July 2007 |
| Location: | Jeddediah Jones Swamp, Kansas USA |
| Posts: | 708 |
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Posted: 18 September 2008 09:58 PM |
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http://www.castingstuff.com/primer_testing_reference.htm you might like this link on testing primer strength.
____________________
I was raised in the 50's on gunpowder and jackrabbits.salt and pepper wooda made'em taste better
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Cohiba
HB Full Member
| Joined: | 26 September 2008 |
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| Posts: | 56 |
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Posted: 3 October 2008 12:28 PM |
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I cant find any 210's or 210M's and WLR's are getting higher. I did find a few cases of 215's for $36 a thousand so i grabbed them up to either use or barter. I dont load any magnums but i do have a 338 federal and since Varget fills the case capacity at below max levels i figure a good mag primer might be in order to ignite the stuff.
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miestro_jerry
HB Life Member
| Joined: | 28 June 2008 |
| Location: | Somerton (AKA BFE), Ohio USA |
| Posts: | 773 |
| Photo: | [Download] | | Are you a handloader?: | Yes | | Favorite type of cartridge to load?: | I load everything! |
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Posted: 3 October 2008 02:19 PM |
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Here is the reference to the page on primers:
http://castingstuff.com/primer_testing_reference.htm
$36.00 a carton of primers, I have recently purchased mine for about $25 a carton of a thousand. I take the ones that I want to store and put them in Reynolds Vacuum bags, suck the air out and put them in storage.
Jerry
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copperhead888
HB Full Member
| Joined: | 20 October 2008 |
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Posted: 28 October 2008 04:24 AM |
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check out this link too
http://www.gunnersden.com/index.htm.rifle-reloading-primers.html
how does someone pick a primer relaive to powder brn rates?????
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72coupe
Handloading Master
| Joined: | 11 June 2006 |
| Location: | Iowa Park, Texas USA |
| Posts: | 1546 |
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Posted: 2 November 2008 02:37 AM |
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I have run many series of test with all the primers I can acquire. What I have found is that some powders give the best group with a mild primer while others like hot primers.
And it does not follow any pattern. 2230 likes a mild primer eventhough it is a ball powder. Several other ball powders I have tried like mild primers.
Basically after you run your powder ladder you just need to run a primer series to get the smallest group. That is part of the fun of reloading.
Just do scientific experimentation, keep good records and shoot a big enough sample to be statistically siginificant.
____________________
Reloader since 1969.
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