I use a soft drink straw from the glove box of the truck. lightbulbIf you put it on correctly there won't be any problem. Had mine out this morning with a .284 and a 7mm STW; all went very well.
I own a Sporter and a V1 and both work flawlessly.
The other models come with a 1/4 inch square tube that you can use the check the clearance between the bore and the bayonet. The Sporter doesn't come with that ( at least mine didn't) so it might be a good idea to stop by a local hobby shop and pick up a length of that to lay across the top of the bayonet and extend to the muzzle to make sure of clearances.