I didn't see your request re: ship co’s. My last shipment was 2023. Quotes from SBS Logistics ($1,198), Badger Cargo ($1,184 - used them) & AHG Trophy Shippers ($1,746). AHG owner's an asshole so wouldn't have used him anyway. Eastern Cape - Houston, TX, so your mileage may vary. NEVER use Karl Human Taxidermy aka Wild Africa Taxidermy on Eastern Cape. Trophies arrived shattered with no padding/packing material.
MAD/TSE engineering in Brisbane did my barrel in a medium profile with a 1:20 twist.
You will need to do a little mod on the extractor by filing it down a bit to get it to grab the 444 run. Inky need to remove 15-20 tho
Also need to modify the mag box to get it to feed
Bob