Beautiful looking rifle and a good calibre. The timber is how I like it. Plain with good grain flow the whole length. As you would know 35 Whelen brass is the same as 30-06 brass. All I can suggest is google the Whelan and check the specs. Check 7X64 brass-Proper Euro brass- that may have the correct dimensions. Also with 06 brass if H/S is a problem you can fire form the brass. The claw extractor should hold the case and allow an effective striker hit on the primer.

Happy Hunting.

Just checked the Barnes manual. the 06 & Whelen have the same base to shoulder length and shoulder angle. The 06 is slightly longer to the neck. This tells me the Whelan is A 30-06 necked to 358 so the head space datum point will be the same for both.