i have a rossi 20" 454. it feeds most 454 loads without a problem and also works well with winchester 255 gr lead RN and winchester 250 gr FN,.
it does not feed / hangs up with: federal 225 SWHP, blazer 200 JHP, federal eagle 225 JSP, remington 230 HTP JHP, or remington 250 lead RN.
maybe...