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December 4, 2011
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For the 414 Super Mag. There is precious little on the net about it and none in any of my loading manuals. I'd like to start off with a good middle of the road load that works in others 414s. So what do you like as far as powder choice, charge weight, primer, and bullet type/weight?
Thanks
Anything worth doing is worth doing well.
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If a man designed it, and a man built it, then a man can fix it.
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February 9, 2009
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Scorpio, did you land your 414? I'll dig up my favorite load for you.
SMF
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December 4, 2011
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Just getting ready to put up some pics, should have them posted in a few minutes.
Anything worth doing is worth doing well.
My father
If a man designed it, and a man built it, then a man can fix it.
My grandfather
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May 2, 2009
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Please try not to blow up that beauty with the first batch of reloads 
....
SHOOT
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December 4, 2011
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OK got a question. The data I have suggests using large rifle primers for the 414. Would there be any problems using Large Magnum Rifle Primers in the 414 brass? I test fit one and there is no physical problem seating the primer. Is there any danger using this?
Anything worth doing is worth doing well.
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If a man designed it, and a man built it, then a man can fix it.
My grandfather
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February 22, 2009
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Magnum primers provide a hotter primer flame and longer burn, so they'll affect pressure. Reduce your loads and try them while observing for sign of too much pressure. Depending on the propellant, you might find a great combination. Note that Magnum primers are best suited for ball or spherical powders. You should be OK since it's a large for caliber pistol case. Just my $.02 from years of reloading (about 30 now..)
FWIW: It seems Winchester primers are generally the "hottest," Federal and CCI are the middle brands, and Remington primers are the mildest.
Best Regards,
Ron
Technically, the glass is always full; half liquid, half air....
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December 4, 2011
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Thanks Ron, I was thinking along the same lines, just wanted some other viewpoints as I've been out of reloading for awhile. I'm loading 25.5gn H110 in the 414 cases which call for large rifle primers due to case capacity, I assume. BTW that is a cutdown from the load listed on the IMHSA site which is 26.5gn H110. I somehow acquired 1000 large MAGNUM rifle primers somewhere (probablly the clerk at last gunshow grabbed wrong box and I didn't catch it until today.). I may cut back a few tenths of a grain on the load and try a few rounds to see how they run.
If it matters, these are Federal Large Magnum Rifle Primers.
Anything worth doing is worth doing well.
My father
If a man designed it, and a man built it, then a man can fix it.
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December 24, 2011
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Call your powder maker. They have tons of data on rare calibers that they can share, but can't afford to maintain on their web sites.
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February 22, 2009
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I've never loaded the 414 and after looking around I've read a few articles which state using rifle primers. What brass are you using and what do they recommend?
I'd start at 24.0 gr and work up in .5 gr increments for a 210 gr bullet. and about 20 gr. for a 250 gr. bullet.
Technically, the glass is always full; half liquid, half air....
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December 4, 2011
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I'm using brand new Starline brass. I don't know what they are recommending on primers. All I've ever read states to use large rifle primers on the 414. I'll just go out tomorrow and pick up some Federal large rifle primers just to be on the safe side.
I know this is an apples to oranges comparison, but I load for my 445 Supermag and it is listed in the reloading manuals. The one load I use for that round is 29.6gn of H110 with a 240gn XTP bullet. That is the bottom load listed for that round. I calculated the case volume of the 414 at approx. .1623 cu in. and the 445 at .1853 cu in. So the 414 has 12 percent less volume than the 445.
25.5/29.6*100%=86.14 so the 25.5gn load is only 86% of the 445s load or 14% less powder.
Now with a case volume of 12 percent less the two loads should be roughly equal in terms of charge per volume.
Considering that the two guns are almost identical except for caliber, I'm thinking the gun should handle this powder charge safely.
I hope that makes sense.
The Hogdon website says not to cut H110 loads by more than 3 percent or you run the risk of poor ignition and a squib load. I cut the IMHSA load recommendation by 4 percent. Do you think I'm being too agressive?
Anything worth doing is worth doing well.
My father
If a man designed it, and a man built it, then a man can fix it.
My grandfather
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February 22, 2009
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I think your logic is sound- There's no doubt the gun will handle it- I was just thinking about the PIA a blown primer can be in a revolver. Not that I would know.....
BTW, for new Starline Brass the site recommends Large Pistol Primer. I think Large Magnum Pistol would be OK, personally (for me), but I'd (officially) recommend starting with the OEM recommended primer. https://www.starlinebrass.com/order-online/caliber.cfm/caliber/414/
Dimensionally, rifle and pistol primers are the same. Cup thickness is different. If the firing pin can ignite the rifle primer, then those are a fine substitute. They withstand higher pressures.
Technically, the glass is always full; half liquid, half air....
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December 4, 2011
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Thanks for the info Ron! I find it interesting that Starline says pistol primers and all the load data on the net says rifle primers.
I guess George Carlin was right when he said "there's no two was about it, there are two sides to every coin"
I'm going to try a few with rifle regular large rifle primers and some with large pistol primers and see if there is any noticeable difference.
I'll report my findings.
Anything worth doing is worth doing well.
My father
If a man designed it, and a man built it, then a man can fix it.
My grandfather
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February 22, 2009
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I expect you won't see a difference unless you shoot over a Chrony or can test for pressure. Keep us informed!
Technically, the glass is always full; half liquid, half air....
December 24, 2011
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Simple enough. If you supposed to be using rifle primers in brass sized for "large primers", then there's a difference in pistol and rifle in the large size. Measuring the depth of the primer pocket will tell you which you should be using. If the pocket is cut for pistol and you install rifle, then they'll be dangerously above flush (proud). If the pocket is cut for rifle and you install pistol, then they'll be recessed and give light strikes.
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December 4, 2011
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Pockets are deep, large pistol primers are recessed, large rifle primers sit nice and flush. My only question was would a large MAGNUM rifle primer be a concern? I somehow wound up with 1000 of them from a gun show and wondered if I could use them. Its not a big deal to get other primers, was just wondering what the differences would be.
Anything worth doing is worth doing well.
My father
If a man designed it, and a man built it, then a man can fix it.
My grandfather
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May 11, 2011
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Here's what a note from Starline included with my 445 brass says
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February 9, 2009
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If I recall correctly, the Starline run of 445SM brass were always for large pistol primers and the 414 were built for large rifle primers. That is how I have been loading them with no problems. Why? I really don't know...
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December 4, 2011
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Here is a link to the article on the IHMSA site. http://www.lasc.us/RangingShotDW414SM.htm
Here is a quote from that same article where he mentions to be sure and use large rifle primers.
" One note of caution, always be sure to use rifle primers with this
cartridge. They're needed to properly ignite the relatively large amounts of
powder we're using in this cartridge and as a safety factor because of the
increased pressures."
Anything worth doing is worth doing well.
My father
If a man designed it, and a man built it, then a man can fix it.
My grandfather
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