feederic

Use a flat stick like a paint stirrer with some 400-600 grit sand paper. You should get a feel really quick about how to finish the job without over cutting. Should only take a few swipes.

You need to figure out why your extractors are going south before putting another one in there.

Very nice!

Pretty much how I see it too.

Call him and make sure he renews before you order otherwise November they are off and his builds times took awhile for me.

My mistake, I thought they were falling off the roster.

I've own two that have served me well. The build times take awgoler, if you want one you need it before next year in CA

Awesome!

Funny thing here is you sort of proved that a heavier G35 will magically absorb recoil with identical loads Also, FRE predicts that of the two lovely guns posted in the Bob Londrigan article, the lighter one will recoil more. While momentum alone would be identical between the two guns. So here is an example of how net momentum change can be zero, mass can change significantly and the two guns would behave very differently as predicted by FRE (although maybe not perceived on the same order of magnitude, but an increase in perceived recoil nonetheless). Also also, the recoil calculator disclaimer on perceived recoil has a few interesting sentences if you read them carefully enough. I will snip them for you bud. Beginning sentences: "The numbers calculated here do not relate to "felt recoil". Felt recoil is different for each person, what is excessive for me might not be for you and vice versa." Last sentence: "It will however give you a good idea how one load will feel compared to another in the same or similar firearm." Well shucks.... I've only counter argued that FRE can be relevant, which you opine is not. I do agree it is not the end all be all, which is stated in the definition of the term free recoil energy itself because there are too many variables to take into account. Since I was playing with the recoil calculator, it was nice to see that a 2lb gun and a 3lb gun under 165pf ammo would also have about a 60% change in velocity between the two guns. Strictly using conservation of momentum and taking the resultant gun velocity this is what we get: Gun 3: 1.69625 lbs. 180 gr projectile 5 gr powder charge 918 fps Gun Velocity: 15.66 fps Gun 3 Loaded: 2.7 lbs. 180 gr projectile 5 gr powder charge 918 fps Gun Velocity: 9.8 fps Delta between the two = 15.66/9.8 = 1.59 or about a 59% increase in gun velocity at the same power factor. Not so out of line with the 64% figure FRE predicted that you are so disgusted with.

All gone! I missed it...

I've been successfully using CNC4PC BOBs for awhile now with their parallel interface. I've seen many nightmares with their USB smoothstepper, so I avoided USB altogether. Some of their connectors are overpriced junk though. I built an industrial electronic cabinet with heavy duty connectors and E-Stop which has not faulted since I have used it. Make sure to get a really nice drop gauge and DTI. FWIW, I have some really nice kurt vises that don't indicate as true as the cheap shars vise I bought. I love my glacerne vise though. Since I am not taking heavy cuts I don't really have a need to test out insane holding power. A swivel base is a really nice option for performing slide work. I wish I bought one up front. Oh yeah, tooling is expensive

Actually, I do disagree. Energy of the fired shot is only one component of free recoil energy, alongside mass of the gun. The gun itself will have an equal and opposite reaction to that of the fired round in terms of momentum and not energy. You are interpreting Newton's 3rd incorrectly. Notice that mgu (mass of the gun) is in the denominator? This means that as the mass of the gun increases, the denominator increases and hence results in less free recoil energy that the gunsmith and shooter have to deal with. A heavier gun feels softer because IT IS softer, as in lower free recoil energy transferred through the gun to the shooter. This can't be disputed, nor can a direct correlation between the free recoil energy and perceived recoil be denied. You've already admitted that power factor and weight affects what is perceived, and you will only perceive what the gun is doing as your fire it. The shooter provides nothing more than a reactionary force. Newton's 3rd law: For a collision occurring between object 1 and object 2 in an isolated system, the total momentum of the two objects before the collision is equal to the total momentum of the two objects after the collision. That is, the momentum lost by object 1 is equal to the momentum gained by object 2. Now tell me, where does it say that the energy of the first object must equal the energy of the second object? Remember, a linear change in momentum results in an exponential increase in energy where velocity is concerned. There is no way for a linear operation such as momentum to change as fast as an exponential operation like kinetic energy when changing velocity. As peterthefish stated, the resultant FRE is only the beginning. How that energy is dissipated by the shooter is a combination of skills by the gunsmith builder, the shooter, the load, and all of the lovely skills we come to benos land to learn.

Very nice!

2 Internet cookies? Please address the "free" part of free recoil. I am quite glad I changed majors as well. Thanks for the support! I have a successful career doing what I love, and I still get to use calculus! The whole "fact ahead of opinion" thing is so two sided- it is your opinion that the only masses relevant in the equation are the bullet and the gun. The rest of us hold it. If you want to do some math instead of just doing what you feel is right, consider an additional mass in your theoretical system- one between 50-100 times greater than the gun itself. Obviously I wouldn't have the audacity to suggest my hands are as solid as planting a mortar into the earth, but I would humbly submit that my grip is more similar to that, than the gun floating in air. Want real cookies? Take your brick to Nationals or the World Shoot and win. You obviously know something most of the shooting world doesn't. If you will excuse me, I am going to go dryfire. Feel free to beat your chest. Physics (outside of the simplified, 2 mass middle school variant) still applies. Care to elaborate on how free recoil doesn't matter? If I had two firearms, one with an incredibly large amount of free recoil and another with an immeasurable amount, which would you want to grab onto? According to the FRE formula, mass of the bullet and its velocity affect the result. Would you say that a 250 pf round does not feel more harsh than one loaded to the minor floor? In general, it states heavier guns and lower PF rounds shoot softer. I agree. Jediwarrior's tungsten barrel does a great job at increasing weight of the barrel, while also decreasing slide weight. Knowing the results of switching from a bushing to a bull barrel in my limited gun, I would love to try his setup.

Lets figure out that FRE equation you provided. If we assume a limited gun weighing 38 oz, 180gr bullet at 175pf, we get 4.237 ft/lb. Add 3oz onto the weight of the gun, and we get 3.927 ft/lb. That's a ~7.5% decrease in kinetic energy. That's only for a free recoiling firearm. ie, one that isn't being held. Yes, the lighter gun will have more kinetic energy after a given distance traveled than the heavy gun, in the same way the lighter can has more kinetic energy than the heavy can at the same height. But you're there to hold the gun, so the energy is transferred into you instead. We're still just changing the way the energy (recoil) is felt. Not to mention, this is just calculating F.R.E. based on the total weight of the gun. So you had better hang your 12oz can of paint from the grip so the recoil is "less", it'll work better than the tungsten barrel. Or: If the recoil is "less" where did that energy go if not into your hands? http://en.wikipedia.org/wiki/Conservation_of_energy With a heavier gun, and according to the FRE formula, there is simply less free recoil energy for any given set bullet and charge. The weight of the gun needs work applied to it before it will move, heavier objects move slower versus a lighter object when given the same amount of energy. That's why free recoil is less for a heavier gun. If one is saying free recoil doesn't matter, that is also saying the weight of the bullet, powder charge, and weight of the gun doesn't matter either. And if they did not matter, I doubt we would have subforums here dedicated to reloading with special pet recipes as well as a surge in steel grips making their way onto shooter's platforms right now. Heavy barrels do an excellent job at dampening recoil because they subtract energy transferred to the slide which lessens its impact force on the frame.

Do you build extra tolerance into the gun for coating? How thick is it?

I had the same issues with an ultrasonic cleaner, at a match no less. Normally I use an ultrasonic cleaner immediately after shooting and give them weeks to dry before loading them back up. I had issues with next day reloading after ultrasonic cleaning.

Did you finish ream it?

I own almost all the finishes on a sti. Hardchrome looks brand new still, the others not so much.

who is making the barrel? I might be interested in one.

Definitely disable the slide stop and get tuned mags.

I don't seem to shoot any faster with it, I have a tyrant.

I was wrapping up shooting with a friend and managed to hit a bullseye at his either 50 or 75? yard target with my last round of .45. Pure luck on the high hold I gave it as well as everything else. Maybe those cast missouri LSWC's are just that good?

I typically request aftec extractors, SVI triggers, stainless mainspring housings, fiber front and adjustable rear, and aggressively stippled and double undercut grip. I stay away from STI safeties. Bar Sto barrel if I can get one, KKM otherwise and either throated for long length ammo. I am sure your gunsmith won't put junk in your gun, there are many excellent parts manufacturers out there today.

I've noticed KKM barrels I've been fitting have been shrinking on just that side. At .013 I'd return it.