I don't know...I have used SR7625 in all my 16 gauge reloads and never had a problem.In fact I shot them 3 years ago up in New Hamphire on New Years Day and it was 10 degrees. But I must admit I haven't shot them at temps. as low as Rich has.
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"Much care is bestowed to make it what the Sportsman needs-a good gun"-Charles Parker
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