I have several 26'' 30cal barrels and an old Savage 110 action, and since I have a 375 Whelen I thought a 30 Gibbs would fit the bill. I have read that Gibbs used 1 in 10'' twist but did do them with 1 in 12'' and 1 in 14''twist and I have both those. I intend to use 150 to 168gr jacketed for this rifle. I would welcome any comments on my choices of barrel action or projectiles. The intended use will be a long range deer rifle. Interested to hear from those who use this calibre. Regards Stephen