You should be fine with the 1:7.5," but as noted, I wanted more flexibility. Below is a factory 100g SP and with 117 Cayuga, which requires 1:7". I didn't want to short-change myself and not shoot longer higher BC bullets that are available to me, especially when I have a say on the twist rate ... but that's just me, but the ultimate choice is yours to make. Good luck!I was strictly going off this.
I am NOT trying to convince you to change your mind, just simply passing information that might be pertinent for your intended use. Below are the bullets I was referring to.I’m honestly not familiar with ANY other 257 bullets besides Blackjack. What are these others your talking about?
Have you tried the SBD2 in your 257 yet? I’m getting great results with 25-06. Can push them to 3300 pretty easy but running at 3200 for brass life.I was initially going the same route but went with 1:7" to give me the flexibility to shoot the 110 Super BD2 and 117 Cayuga.
Sorry, I have not. I still have another 5 weeks to wait for my barrel. The COAL of the Cayuga is 3.425".Have you tried the SBD2 in your 257 yet? I’m getting great results with 25-06. Can push them to 3300 pretty easy but running at 3200 for brass life.
also what’s your coal on the Cayuga? Considering a tikka 257 for the next build but need to keep it 3.4ish or less for factory mags
I look at them as the minimum recommended twist rate. Just like Berger noted with their 133s (https://bergerbullets.com/product/25-caliber-133-grain-elite-hunter/)The PVA bullets take a 1:8, and the Badlands 1:7. Wouldn’t a 1:7.5 split the difference for all three?