Anyone have data on reloading .223 tracer?

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I've picked up some 62 gr tracer bullets. I've got plenty of WC844 powder, but don't know how much I should put in.

The weight is actually 60gr, and I've talked to techs at both American Reloading (where I got the powder and bullets) and Hodgdon. Neither could or would offer much advise other than start low and work up. We're such a litigious nation.

So, has anyone out there got any help?
 
Got them from American Reloading. https://www.americanreloading.com/en/

Thought they would fun, but I'm quickly learning they're a problem. They are about 3/8ths of an inch longer than regular 223. Hope to get some data, I've got one round loaded with 18gr of WC844 (H335). Going to test it this evening.
 
They are very long and take up a lot of case volume. A reduction in 62 FMJ data is required. Military data for the M856 Tracer is 1.5 grains less than for the 62 gr. M855 FMJ bullet. WC 844 surplus powder can vary in burn rate so I'd start low at around 22 grains of WC 844 with your tracers and work up. My load with my WC 844 is 23.6 grains using LC brass and RP 7 1/2 primers with an oal at 2.250-2.255". They are a dim trace and don't get bright until 75 yards or so and they burn for a long time and out to 900 yards or more. They can be hard to see in bright sunlight and easily start weed, leaves, and grass fires. Shoot only in wet weather and make sure they are legal in your area.
 
Thanks RG1. I was thinking a 10% reduction. Just wanted a little reinforcement. I'll start there and go forward. I'm not sure if they're legal or not, but plan to only use them on my own property. I bet they'll be pretty at night over the ocean. Just something for fun.
 
Shot plenty of them in the service,they always seem to move slower,but pretty to watch. Service weapons sure but I wouldn't give them a steady diet in your pet rifle.
 
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