Old timer, you're dead wrong about "too much twist". That's an old school train of thought that MIGHT have been true at one time because bullet manufacturing technology wasn't near what it is today. Any imperfection in the bullet can be amplified if over spun. Put that God damn 9 twist on and go for it! You are overthinking it and doing your customer a disservice by creating confusion. I personally developed handloads in two different 8 twist factory 300 Win SAAMI chamber rifles with 210 bergers. They both shot in the .3-.4 MOA range and held up fantastic beyond 1200 yards. What you don't understand is that with today's bullets, there is no downside to fast twist unless we're taking it to the point of shredding jackets. Faster twist produces a higher SG (gyroscopic stability) which helps tremendously for those of us who shoot ELR as the bullet transitions into the subsonic region. But you're a big long range guy... you knew that already right?
I figured all you'd have is an empty insult. No surprise. Something tells me that your customer isn't looking for a bench rest gun and you're jerking him around with obsolete information. Catch up with the times, be teachable. There's always something new to be learned. Grow or get stagnant. Tell your customer if he would like any solid gunsmithing recommendations I could point him to several.
When the 6.8 Western came out, most bullet manufacturers came out with heavy .277 bullets for it. I like to hunt with 130 grain bullets in my .270 Win, but I grabbed a couple boxes of the heavier bullets to see how they shot. A lot of people told me that the twist in my .270 wouldn’t stabilize the 145-160 grain bullets. First test I did was with the Hornady 145 ELD-X. Turned out to be the most accurate load I’ve ever shot out of that old .270!!
Doesn’t twist rate and stability change with speed? So if a Berger 230 wont stabilize at 2600fps out of a 1:10 300wm, But will it out of a 1:10 300rum at 3000fps?
@JohnDoe-ud2cc I actually had this very thing happen. I had a factory Savage Competition Rifle in 300 Win Mag. 1:10 twist. It shot everything I put down the barrel up to 200gr bullets. But when I tried the 225gr Hornady ELDM, it was as accurate as a slingshot. So I took it to my buddy's shop and chucked it up in his lathe and rechambered it to 300 RUM, and the RUM chambering shot the 225's into 1" groups on a 300 yd target. The velocities went from 2870 to 3100 fps, and I believe without a doubt that the much higher velocities is what made the difference in this situation...
i have a 300 RUM BR gun that would rival any gun you ever built precision wise. 225 eldm at 3,350 fps out of a 34" straight cylinder 1.350" on a BAT M receiver. Shoots in the 1's with regularity. I really hope you give the RUM a shot in this build, very under rated cartridge in today's world just because its very long.
Do you realize, how easy it is to just scroll on by? This man is giving very valuable information to many that actually deem it as valuable as he does. Your 3rd grade teacher has failed you, miserably....
@@quarterminutemagnums peterson and ADG make 300 rum brass now sir, and both of them are available. Both seem very nice, but I think I like the ADG better.
I’ve got a 20” bartlein 9 twist in 300 prc and 245’s absolutely hammer. Yeah it’s slow. Retumbo at 2675 fps. The animals sure don’t like it though. It shoots really well to 800 yards. Like smashing 1/2 min rocks at 750 yards pretty dang consistently. Again, like you preach. It’s throated to have the neck shoulder junction and boat tail mate up perfectly.
This is great info. I recently did my 300 Win Mag on a Brux 1:9 specifically to shoot the 230gr Hornady A-Tip. It shoots very well with a group of 2.2" at 500 yds. My question is, I was shooting 225gr Hornady ELDM, in a 1:12 barrel, and they shot very well with 2.8" groups at 400 yds, but when I tried the 230gr A-Tip the bullets were hitting the paper sideways. My rifles are hunting rifles, and not bench rifles, so if they shoot consistently 3/4 MOA or better, I'm happy. But in your opinion was I on the edge with the 225's, and the 230's just needed more twist? Thanks for all of your valuable info and even more valuable time...
@quarterminutemagnums I have a Remington 700 long range, long action that I pulled the 300 rum barrel off, trued the action, put a Krieger on it and chambered it in 300 win short, added a timney elite and beded the B&C stock. It's definitely not one of your rifles but it shoots like one. I enjoy the channel Thanks.
