44 mag Ruger SBH Leading

[monge]

Lube is very important at max velocity but at modest loads alox does work, I shoot 350gr at 1800fps out of my 45-70 lever 150 yards 11/2 all day no leading ! this is a bone breaking shock inducing load no tracking what more does one ask for in a short range load.as for my rugers they do very much in size every gun is different you must slug or pin gauge each gun.

[NSP64]

Check your cylinder throats, then slug your bore.
Look for tightness at the barrel/frame joint.

[.429]

Then tell them to argue with SAAMI, as it is their specs...

Nah, I won't be telling them. But if you'd like their #, I'll share it with u

[44man]

Yep, just changing the lube can make a gun shoot bad or make it a tack driver.
Nothing to do with leading at all so leading is not the only thing to look for. I feel that is the biggest mistake made, to only look for a lube that does not lead the gun.
Once the bore stays good, it is not where you should quit.

[detox]

Your problem is a classic

You may have two problems. You are getting gas cutting past bullet caused by bullets being sized too small and your bullets are not obturating (swelling up) when fired caused by alloy being too hard for pressure curve.

Size bullets .001-.002 oversize
Use quicker burning powder and softer alloy...especially if cylinder throats are smaller than barrels groove diameter. Keep velocity under 1000fps with soft alloy (under 12 bhn)

[kweidner]

Rugers a notorious for frame restriction check that first or it won't matter what you do. Fire lapped mine twice before I got it under control. Love my Rugers......and Dan's ......and Smiths .....and. .......well you get the picture.