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Load 7x57 on a 650?

So there isn’t a caliber conversion kit for this caliber but would the .270 win kit work for this? Because the 550 has a conversion for bot the .270 and 7x57

Do you have a #1 Shellplate in another kit such as .45 ACP or .308 Win that you could try? The only thing I could find in my "misc range brass bin" was 8x57 and it fit but there was no play. If you have some brass, check the extractor groove diameter with a caliper. The part of the #1 Shellplate that goes in the groove is about .407" on both of mine and that is the only area where I see where you could have a problem.

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