Magnum Small Rifle Primers

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I just picked up a box of those myself, and will be doing some side-by-side tries with the standards - see what the diff is - -
 
What is your go to load now? Bullet type and weight, powder and powder charge and the COAL?

Now for the SPM primer, like the others said, you should have no problems and you might like them better while saving money too.

Unfortunately I have only 1,000 CCI-450 primers in my stock but I have MANY more CCI#41 primers but they cost a lot.
 
I know quite a few reloaders that use SRM for their AR-15 .223 loads and are quite happy with it.
 
Reload Ron and Copper Falcon your high SD problems may very well be in the brass you’re using. Both are using LC. On Ron’s chart there’s a good 35 ES load in there with just one or two high and low shots in each row.

If you aren’t annealing, chances are that your brass is at different degrees or work hardened giving you different neck tensions and the occasional WTH type flyer.
I try to crimp my way out of it when I start to notice. If that doesn’t work I either anneal small batches on a handheld bit( see link) or for larger batches I use a friends bench source.

https://www.littlecrowgunworks.com/store1
 
bluejay75 said:
Reload Ron and Copper Falcon your high SD problems may very well be in the brass you’re using. Both are using LC. On Ron’s chart there’s a good 35 ES load in there with just one or two high and low shots in each row.

If you aren’t annealing, chances are that your brass is at different degrees or work hardened giving you different neck tensions and the occasional WTH type flyer.
I try to crimp my way out of it when I start to notice. If that doesn’t work I either anneal small batches on a handheld bit( see link) or for larger batches I use a friends bench source.

https://www.littlecrowgunworks.com/store1
Click to expand...
A good point there. My LC brass was once fired and I did not anneal. I did the usual of pressing a bullet against a wooden block and really on several but that says nothing as to uniformity of bullet hold cartridge to cartridge. Maybe this summer, before snow flies, I'll give this another shot.

Thanks
Ron
 
A weak ignition can cause extreme spreads to grow although 100 fps is beyond me, I do not anneal nor do I have huge extreme spreads, where are you fellas getting this once fired LC brass ?
 
South Prairie Jim said:
A weak ignition can cause extreme spreads to grow although 100 fps is beyond me, I do not anneal nor do I have huge extreme spreads, where are you fellas getting this once fired LC brass ?
Click to expand...

He is shooting 26.1 H335 in military brass with a 53 grain bullet. Sierra says he’s over max by nearly 2 grains. That’s most of it most likely. Your brass should be good for a few more firings. Maybe redo the test right at Sierra’s max and check spreads.

0E621FC6-4542-4219-8BFC-8DE1C3E9B3E0.png
 
26.1
-24.9
_____
= 1.2 grains in a small cartridge would definitely effect group size ( scattermode)

1.2 gr of scale drift would probably send the es through the roof.
 
@ reloadron Did that load have pressure signs?

One stage up from rookie would classify me as a journeyman in my estimation so look at my points as pure speculation. But I figured 2 grains over due to case capacity. And the whole other topic of which Reloading Manual WONT blow you up. I have seen some loads in the Lee Manual that have to be on the verge of blowing someone up. 2 different times I saw charges that gave me heavy bolt lift at least 2 grains under what they published. On the opposite end you can almost add a grain to nearly all of Hogdon loads (don’t suggest trying that but their loads are greatly safesided). Barnes, Sierra, Lyman and Nosler seem to be in the middle.
 
South Prairie Jim said:
A weak ignition can cause extreme spreads to grow although 100 fps is beyond me, I do not anneal nor do I have huge extreme spreads, where are you fellas getting this once fired LC brass ?
Click to expand...
The brass likely came from Brass Bombers who last I looked was no longer in existence. Also, that data was something I ran just over 5 years ago, actually June of 2016. I still have an image of the target.
223%20Primer%20Test.png

Anyway, I don't want to drag a thread off target. The focus should be on the thread starter. All the groups are 10 shots. Anyway, back to the thread starter...

Ron
 
Blue68f100 said:
Are you looking at the same target I'm seeing??????

BR4 has the most vertical stringing of the group. So that puts it in last place.
Click to expand...

I have to agree with Blue as far as BR4 being the worst of the four. Also all of these groups are nothing to sneeze at and also helps to substantiate that ES is not the bees knees as far as accuracy is concerned.
 
Guys group shape can be influenced by several tuning steps, what im seeing is the group size center to center.
 
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71GTO said:
I have to agree with Blue as far as BR4 being the worst of the four. Also all of these groups are nothing to sneeze at and also helps to substantiate that ES is not the bees knees as far as accuracy is concerned.
Click to expand...
Correct however an es over 100 tells ya something is wrong, perhaps the chronograph...

Oh BTW, I'm wrong a lot so be your own council ..
 
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Guys, can we get back to the poor thread starters question? I don'twant to be the one to hijack his thread as a result of my post. :)

Yes, the BR4 primers showed vertical stringing but keep in mind my main objective, as mentioned earlier, was to make sure I didn't shoot a sky screen. The Chronograph was an Oheler 35P which still serves me well. The rifle was a project gun I used for a NRA rifle course years ago. Originally a Remington 222 which I worked on. The groups could have been better and figure the grid is 1.0" squares.

Anyway, back on target for the original poster I would suggest a less sensitive primer like a CCI #41 which like the CCI 450 is a magnum type primer.

Ron
 
Thanks for all the thoughts. Didn't feel thread hijacked at all, one thing leads to the next. That was my first thread post, glad everyone chimed in. im looking forward to trying out the CCI-450's. I am attempting to make the best rounds for a good factory AR with an 18" 5R rifled barrel and a 5.56 chamber. i want to try everything before i step up to a 20" .223 Wylde barrel. Going to start a new thread about my foray into light bullets in .223, A.K.A. 36gr. Varmint Grenades, 40gr.FB tipped and 50gr. TSX's. Gonna start with H322.
 
I think you will like the results you get with the CCI-450 primers but I get my best groups with the CCI#41 primers. They are very close anyway so there really is no reason to spend the extra money. I only have them because I got 5,000 at a very good price a few years back.

For my bolt action .223 I use the CCI-400 primers which seem to perform very well in a bolt action rifle. (Howa 1500)
 
bluejay75 said:
Reload Ron and Copper Falcon your high SD problems may very well be in the brass you’re using. Both are using LC. On Ron’s chart there’s a good 35 ES load in there with just one or two high and low shots in each row.

If you aren’t annealing, chances are that your brass is at different degrees or work hardened giving you different neck tensions and the occasional WTH type flyer.
I try to crimp my way out of it when I start to notice. If that doesn’t work I either anneal small batches on a handheld bit( see link) or for larger batches I use a friends bench source.

https://www.littlecrowgunworks.com/store1
Click to expand...
All my brass was sourced from the range right before covid hit. Going to try Lapua next even though my book "Top Grade Ammo" says its not great. That statement is counter to everything else I have ever read or heard about brass. Actually there are a lot of things in the book that seem way off base..
 
I honestly kind of prefer the CCI 450's in .223 AR loads. I've shot the same load with CCI 41's, 450's, Fed 205 & 205M's and haven't really been able to tell a difference with accuracy. Maybe I'm just not a good enough shot to tell the difference either. Definitely worth picking up and trying them though!
 
I think it can be difficult to judge anything at the shorter ranges, but once a fella starts to stretch out to 200 -300 yards and further it becomes quite easy to spot a tendency in a load.
 
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