I am wanting to get a Bore Guide for cleaning my rifles, i have a Tikka T3 300 WSM, a Browning X-bolt 7mm WSM and a Winchester M70 Sporter 270 WSM and soon to be Sporter 300 WSM.
I don't have one (yet) but I've read good things about the Lucas bore giudes. I need to order one, since my Howa (and, I assume my Vanguard when I get around to mounting a scope) will not allow any of my three current bore guides to enter the back of the action (bolt hole is too small).
I've used Sinclair bore guides for quite a while and their rugged. If they don't have what you need they will make one up for you to the best of my knowledge.
I have a couple of the Bore Tech guides. I have found that they don't work on all makes of rifles. I do not have the particular one you show, Fotis; rather, I have the 25-30 Cal and the 8mm to 416 Cal guides. They work with Rugers, but don't come out without removing the tip. Whatever bore guide is used, it is a good idea to place an old cloth to avoid dripping cleaning solvent on the stock. Even the Bore Tech will allow some drips.