Yes, the Griz mini lathe I got in 2002 really sucks as a lathe. It can chamber pistol barrels but the crossfeed and compound are worthless. The 3 jaw chuck is a quick change for wire wheels on mandrels. Get it far from me on a deep bench and perpendicular, and I have never been hit with flying debris. I can't say that for the wife with a weed eater.
I have 3 rifles chambered and ready for the range. They do not have any paint, bluing, sanding or other appearance stuff done. The last time I made rifle beautiful before I shot it, it turned out to be a 2 moa 260.
1) 1903 Turkish Mauser Douglas 12" twist barrel 6mmRem, Boyd's pro varmint stock, Karsten's custom cheek rest model A, Harris swivel bi pod, KMW pod lock, large aluminum round rear pillar, long rectangular recoil lug/front pillar, TIG welded extender bolt handle, #S45 rear scope base milled on the underside to fit, USO 1.8x10x37 scope, Bold trigger with safety, and SWFA tactical rings. I have 100 rounds of ammo loaded.
2) 2015 Dumoulin Mauser Shilen select match 8" twist ratchet rifling 6.5-06 Boyd's pro varmint stock, Karsten's custom cheek rest model A, Harris bi pod, KMW pod loc, large aluminum round rear pillar, long rectangular recoil lug/front pillar, sling stud mount [really long], Limbsaver large grind to fit pad unground, #S46 and #S54 Weaver scope, Bold trigger without safety, bases milled flat on the bottom and glued
*, Sightron SIII 3.5x10x44, Weaver tactical rings 48355. I have 200 rounds of ammo loaded.
3) 1939 Mosin Nagant, Krieger stainless with black finish,300WinMag, Walnut stock, large rear round aluminum pillar inletted for Timney trigger, front pillar/recoil lug shaped like a toilet and made of Aluminum, Harris swivel bi pod, Alpha bravo pod loc, Uncle Mike's sling swivel studs, Limbsaver large grind to fit pad unground, Leupold VX3 3.5x10x40 CDS, Millet angle lock rings, homemade muzzle protector, galvanized nail as ejector over ride button, milled out magazine box for belted magnum length and width, TIG welded bolt handle extension, ATI scope mount modified for 3rd hole, I have 50 rounds of ammo loaded.
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* Why were my scope bases getting loose?
Typically two Weaver scope bases and each base has two 6-48 screws.
Grade 5 bolts are good for 127 ksi in tension
6-48 screws have a 0.12" root [minor diameter]
Area of a circle = pi r squared = 3.140(0.120/2)^2 = 0.0112 sq in
Tension = area times stress = .0113 sq in 127 kpsi = 1456 pounds tension per screw
There are 4 screws = 5745 pounds potential clamping force.
The screws are only loaded up typically to 50% of rating = 2873 pounds total clamping force on the two bases.
If I look in quickload at the 6.5-06 I just built with a 142 gr Nos Bal tip Long range bullet accelerates from 500 fps to 2000 fps in 0.4 ms.
The bullet weighs 142 gr = 142gr/7000 gr/lb = .02 pounds
The rifle recoils proportionally slower.
0.02 pounds / 8 pounds = 394 times slower than the bullet.
500 fps / 394 = 1.27 fps
2000 fps/394 = 5.07 fps
An 8 pound rifle in recoil reaction would then accelerate in proportion from 1.27 fps to 5.07 fps in 0.4ms
acceleration = change in speed/ change in time
[5.07fps - 1.27fps ]/0.4 ms = a peak acceleration of 9500 ft/sec sec
If a 2 pound scope were attached to a 6 pound barrelled action and stock they would act as an 8 pound single mass.
The mass of the 2 pound scope is = [weight]/[gravity] =[2]/[32 f/ss] = 0.0625 slugs
Force = mass acceleration = [.0625 slugs ][ 9500 ft/sec sec]= 594 pounds of force pushing back on the scope in recoil
The Mausers I just built is made of steel, as are the modified S54 and S46 bases.
Looking up the coefficient of static friction of steel on steel:
https://en.wikipedia.org/wiki/Friction
Case #1) 0.74 ~ 0.80 for dry and clean steel
Averaging the two would be 0.77 coefficient of static friction clean steel on clean steel
The static friction force threshold of slipping = [coefficient of friction clean steel][clamping force] = [.77][2873 pounds]= 2212 pounds force threshold.
Because the static friction 2212 pounds is greater than recoil reaction on the scope mass 594 pounds, the scope bases should not slip on the reciever.
Case #2) But the coefficient of friction for lubricated steel on steel is 0.16
The static friction force threshold of slipping = [coefficient of friction lubricated steel][clamping force] = [.16][2873 pounds]= 459 pounds force threshold.
Because the static friction 459 pounds is less than the recoil reaction on the scope mass of 594 pounds, the scope bases should slip and the screws should start shaking loose.