Recent content by GlockTerrier

This clearly points to a lack of a dynamic stability in a bullet flight. The physics of the spining bullet flight is that right after leaving the barel the spinning bullet "corkscrews" witin 1-2moa for about 7000 calibers (0.224" * 1000 = 224" ~20ft) length of flight. With dynamically stable...

Hi, guys - as I've admitted earlier, I'm a relative newbie in a handloading - and here's what I want to ask from my respected and experienced colleagues in this new to me craft: I'm reloading .223Rem. Originally I had my once fired cases trimmed to 1.753", necks chamfered and deburred, etc...

This is interesting.... If you have a lower twist rate than necessary to stabilize the bullet this means you may need to increase its speed to get a spin required to stabilize the (longer/heavier) bullet.... Perhaps the problem lies with a damage of thin jackets of a lightweight bullets... These...

Walkalong, naughty you, you're on the verge of crossing into philosophical porn about scientific method, randomness, determinism, etc. :) Out of all people here... :) Statistics as method comes into play when gazzilion of physical factors that deterministically define every individual...

Peterotte, with all respect, I think you had probably a very solid but still a shooting rest for your rifle... ;) It greatly diminished but did not exclude completely POA variability from shot to shot. But have you seen Ricks' "machine rest" contraption ? It is no rifle anymore - it is some...

Makes perfect sense to me, peterotte! In fact you've just formulated pretty much a definition of a probabilty distribution function from statistics... :) I keep this type of description in my head as an aggregate description of my accuracy - like, at this distance with this ammo I can hit this...

I think the rest of your post tells me that you've got my point pretty good. :) Only "machine rest" or other some like contraption is capable to eliminate "human factor". Nothing else. Note that 1.5" out of 10(!) from "machine rest" is a good(!) group in 100 yards. And if you waded...

Never doubt your word, Your Honour - but out of sheer curiousity - how do you know that? :D

Thank you very much, taliv! There was not a whole lot of a new or interesting information for me wrt statistical group measurements, my college professors many years ago made sure that I never forget such basics :) However, I found a quote there from Rick Jamison who actually built and...

Thanks! I'd appreciate that very much! I think I understand random distrubitions, bell curves, "three sigmas", etc.. I'm just curiuous if there's a sense of relative contrubutions to this "randomness" of various factors in a "typical group" - say, bullet flight anomalies (random shift of POI...

He-he... Just wanted to let you know that I was dumb enough actually to waste my time to measure variances of all above factors for two kinds of bullets: Sierra 52gr MK - and twice as cheap Hornady cannelured 55gr BT-FMJ The variance/consistency of a three measured factors : weight, OAL...

Sorry, peterotte - I personally never measured a runout. The idea that geometry measurements may help to estimate imperfections in the bullet having effect during rotation at 300,000 rpm after being fireformed in a more than a foot of a hot steel rifling at 3 speeds of sound just by geometry...

Was that a hard copy article or is there some online link to it? I'd love to read it... I also thought that 0.0005" displacements in a soft lead core bullet do not seem too hard to inflict...

:) Real benchresters do not ever check their targets for an evidence where their bullets flight took them - the competion is decided just by reading of windflags... :) Shooting is optional - after all - everybody has best barrels, actions and bullets, so - what would be the point?... :neener...

Amen to that... :) However, the subtle point that intrigued me a lot in this discussion was that once one has best his barrel and action thing figured out - one has an ideal platform for experiments and research in rifle-imprinted bullet flight and evaluation. Want to know how this...