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10-23-2017, 09:39 PM
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Join Date: Sep 2010
Posts: 406
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1st stupid reloading mistake
Just starting to develop rounds for a new to me 0.270. Start low, groups of three, with a total of 24 loaded. Just noticed that I used CCI 250 large magnum primers. Any reason for concern or go ahead and shoot and watch for over pressure sign?
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10-23-2017, 09:54 PM
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Join Date: Jul 2010
Location: North of Cochrane
Posts: 6,674
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How do the group?
Check with the experts but I've never noticed much difference in the primers.
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10-23-2017, 09:58 PM
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Join Date: Aug 2013
Location: Drayton Valley
Posts: 1,258
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You said you started low and worked up - not a big deal just watch for pressure as you normally would
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10-23-2017, 09:59 PM
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Join Date: Apr 2011
Posts: 1,247
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Quote:
Originally Posted by James 1
Just starting to develop rounds for a new to me 0.270. Start low, groups of three, with a total of 24 loaded. Just noticed that I used CCI 250 large magnum primers. Any reason for concern or go ahead and shoot and watch for over pressure sign?
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I'd pull them all and start again, not worth getting hurt over or someone else close to you .
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10-23-2017, 10:05 PM
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Join Date: Oct 2008
Location: Alberta
Posts: 2,824
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Been using MAG primers in 270, 30-06, 243,6.5 x 55 . 9.3 x 62 and a few more over the past 40+ years and no issues so far.
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10-23-2017, 10:06 PM
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Join Date: Nov 2009
Location: East Central Alberta
Posts: 8,315
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I can’t speak to loading for 270 Win, but for calibers that I load, I would have no reservations about using a magnum primer with a low starting charge weight ... and carefully monitoring pressure.
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Old Guys Rule
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10-23-2017, 11:16 PM
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Join Date: Oct 2014
Posts: 103
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Its fine visa versa. Just watch for pressure they will run a bit hotter with magnum.
Quote:
Originally Posted by James 1
Just starting to develop rounds for a new to me 0.270. Start low, groups of three, with a total of 24 loaded. Just noticed that I used CCI 250 large magnum primers. Any reason for concern or go ahead and shoot and watch for over pressure sign?
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10-24-2017, 06:00 AM
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Join Date: Sep 2010
Posts: 406
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Thanks. I will test them out
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10-24-2017, 06:09 AM
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Join Date: Dec 2008
Location: Near Edmonton
Posts: 15,049
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I use mag primers to work up loads in all of my hunting loads from 223 to 460 weatherby. Any load that may be used in sub zero weather is better off with mag primsrs. CCI 250 is the mildest of the mag primers. Win and fed 215 are the hottest.
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10-24-2017, 07:43 AM
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Join Date: Dec 2008
Location: Camrose
Posts: 45,131
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As long as you work up the loads, you will be fine. The people that run into problems with this are the fools that just choose a maximum listed load in a manual, or off the internet and don't bother working up loads.
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Only accurate guns are interesting.
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10-24-2017, 07:56 AM
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Join Date: Dec 2008
Location: GP
Posts: 950
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Quote:
Originally Posted by FishHunterPro
I'd pull them all and start again, not worth getting hurt over or someone else close to you .
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Not the case at all... most people I know have loaded magnum primers. In fact it is suggested by many companies if the ammo is to be used in cold weather.
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10-24-2017, 08:29 AM
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Join Date: Mar 2011
Location: three hills
Posts: 801
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Quote:
Originally Posted by Desert Eagle
Not the case at all... most people I know have loaded magnum primers. In fact it is suggested by many companies if the ammo is to be used in cold weather.
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Speer Manual always suggest to use a magnum primer when using ball powders also.
I have used them in 243win, 270 win & 30-06 with no problems how ever I did get better spreads on the crony using large rifle primers.
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10-24-2017, 08:53 AM
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Join Date: Feb 2012
Location: Blackfalds
Posts: 6,948
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I’m new to reloading too, but I’m using Magnum primers in 308 and 7mm Rem Mag. If you are working a load up, having a magnum primer won’t hurt. It’s when you switch without working up a load.
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10-24-2017, 09:01 AM
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Join Date: Dec 2014
Location: Calgary
Posts: 273
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Quote:
Originally Posted by James 1
Just starting to develop rounds for a new to me 0.270. Start low, groups of three, with a total of 24 loaded. Just noticed that I used CCI 250 large magnum primers. Any reason for concern or go ahead and shoot and watch for over pressure sign?
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If you started low I wouldn't worry. I get about 10-15fps faster using mag primers. Once you get close to the max switching from standard to mag primers could be enough to overpressure.
Mag primers seem to work better in cold weather as well
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10-24-2017, 04:23 PM
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Join Date: Jan 2008
Posts: 4,331
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mag primers
I put that #$%@ on everything and have for 40 years as well.Harold
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10-24-2017, 05:56 PM
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Join Date: Sep 2010
Posts: 406
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Quote:
Originally Posted by Pioneer2
I put that #$%@ on everything and have for 40 years as well.Harold
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Haha. That puts my mind at ease.
Thanks for replying.
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10-24-2017, 08:18 PM
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Join Date: Oct 2009
Posts: 4,858
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What powder did you use? Might be better off using Magnum Primers. I know for my .270 there were a few powders that recommended magnum primers.
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10-24-2017, 08:23 PM
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Join Date: Jan 2013
Location: onoway, Ab
Posts: 6,992
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Just wondering how many of you guys have loaded powder and forgot to put in primers. I have done this twice.
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10-24-2017, 10:38 PM
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Join Date: Sep 2010
Posts: 406
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Quote:
Originally Posted by raab
What powder did you use? Might be better off using Magnum Primers. I know for my .270 there were a few powders that recommended magnum primers.
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H4831SC. Pushing 130gr Accubonds
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10-24-2017, 11:14 PM
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Join Date: Feb 2012
Location: Blackfalds
Posts: 6,948
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Quote:
Originally Posted by Smokinyotes
Just wondering how many of you guys have loaded powder and forgot to put in primers. I have done this twice.
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I did it once.
I was using federal brass, but somehow a Hornady brass got mixed in. Instead of putting it in my mixed lot bin, I just set it to the side. I primed all the federal cases, then when it came to powder I grabbed the Hornady and used it. I seated a bullet in it, then put it in a Tupperware to go to the range.
Before I went to the range I noticed a few sticks of powder in the Tupperware. I pulled all the cartridges out and found the Hornady brass without a primer lol.
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Trudeau and Biden sit to pee
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10-25-2017, 07:35 AM
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Join Date: May 2014
Location: Calgary
Posts: 1,747
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Quote:
Originally Posted by DiabeticKripple
I did it once.
I was using federal brass, but somehow a Hornady brass got mixed in. Instead of putting it in my mixed lot bin, I just set it to the side. I primed all the federal cases, then when it came to powder I grabbed the Hornady and used it. I seated a bullet in it, then put it in a Tupperware to go to the range.
Before I went to the range I noticed a few sticks of powder in the Tupperware. I pulled all the cartridges out and found the Hornady brass without a primer lol.
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Ha. I didn't get quite that far. On the weekend I loaded up a bunch of .308s. I had 45 prepped and primed cases and needed five more. They had been tumbled but nothing more. Still had the old.primers in them. I weighed out two or three charges before pausing to feel foolish 
Colin
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10-25-2017, 08:37 AM
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Join Date: Jul 2010
Location: Rocky Mt. House
Posts: 1,829
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Oh i think we have all charged an unprimed case lol
If your just doing load development the primers will be fine
My worst mistake was not checking/trimming brass when i should and assuming new brass would never be to long. I was wrong
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10-25-2017, 12:39 PM
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Join Date: Oct 2009
Posts: 4,858
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Quote:
Originally Posted by James 1
H4831SC. Pushing 130gr Accubonds
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Have at 'er, slow burning powder will probably respond better to the magnum primers vs the regular primers. Just work your way up and know the signs of over pressure.
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10-25-2017, 01:23 PM
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Join Date: May 2007
Location: Dreadful Valley
Posts: 14,620
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H4831 and over 55 grains(my rule of thumb is 4350) and possibly shot below 0C.
Use a magnum primer.
Work your load up mind you.
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There are no absolutes
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10-25-2017, 06:55 PM
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Join Date: Nov 2008
Location: Hudson On
Posts: 639
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I use magnum primers exclusively on everything I own.
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Buy the best cry once .
Buy cheap cry every day .
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10-26-2017, 06:37 AM
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Join Date: Dec 2012
Location: At the end of the Thirsty Beaver Trail, Pinsky lake, Alberta.
Posts: 24,595
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Quote:
Originally Posted by James 1
Just starting to develop rounds for a new to me 0.270. Start low, groups of three, with a total of 24 loaded. Just noticed that I used CCI 250 large magnum primers. Any reason for concern or go ahead and shoot and watch for over pressure sign?
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You're alright...as said earlier start and work up and look for pressure signs,
You'll make other mistakes reloading...trust me... 
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