Greetings @Frogfeatures,
Assuming you have a military Cacarno rifle these can be a handfull to load for. They have an odd groove size and gain twist. Hornady did offer an oversize projectile at one time for the Cacarno and from memory heavy round nose projectiles were preferred. Will dig into my records and get back to you. The Cacarno rifles sold for $45.00 when they came to NZ decades ago.
GPM.
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