375 Ruger

You are correct for the most part. Hammer bullets are grooved for less pressure. and to some extent Cutting edge are as well, Lehigh does this in most bullets!

When I started with the "Original" X Bulletin……pressure was an issue as was fouling in some rifles. The pressure was easier to address than was the fouling…..thankfully, my rifle was not one of the "foulers"!

I attribute that to it being a "match grade" barrel! A friend wasn't so lucky….with his brand new SS Rem. 700 in 25-06…..you couldn't cover a 5 shot, 100 yard group with an open hand?

A lot of "elbow grease" hand lapping his barrel helped greatly…..but, it was still far from great! Though that Fall, he killed the largest bodied bull Elk that I've ever seen……with one shot. I was pretty impressed with that little 25-06! memtb
 
Aren't all mono's now with grooves……and with the grooves are they still producing higher pressures than a cup and core of equal pressure?

I thought that the grooves eliminated the pressure issues of old……but, I may very incorrect! memtb
Yes sir, however, and Ive tested this with Barnes bullets: They simply aren't gonna squish like a lead core will. Grooves or not, they're gonna have higher pressures than a standard lead core, all else being equal
 
I only shoot 1 Barnes bullet these days.... a "30 CAL TTSX BT 130 GR. it's on a 30/284 Ackley Imp. 40* use it for "Speed Goats". in Colorado.
 
Yes sir, however, and Ive tested this with Barnes bullets: They simply aren't gonna squish like a lead core will. Grooves or not, they're gonna have higher pressures than a standard lead core, all else being equal

Now I wonder, though I'll never leave my mono's, how fast I could push a cup and core! ⁉️ memtb
 
win mod 70, short action push feed opened up for 284 Ctg, McMillan stock, la bounty re-bore tapered octagon BBL with flutes on flats 25 1/2" Holland brake
 

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