Just two clear things up......
OK so this may well be my last post, I may get banned, Ive been threatened with getting sued, and Ill probably loose any respect I had but if i save some one a bolt two the head its worth it for me.
As most will no Iv been a long time supporter of KG, I brought a 300 earlier in the year, real nice bit of kit
I had concerns that I raised on more than one occasion about it being two hot and stamping brass, I even sent it back only two be told it was sweet, this guys nos way more than simple framer I thought....
Anyhow along comes something that I just had two have, up for sale goes the 300 and sold.
The purchaser on inspecting the brass asked if I had reloaded for it, Which I hadn't KG did all the loading.
He then asked KG two to redo load development as he was unhappy with the stamping and would not fire it.
Unfortunately the gun builder just thought the whole thing was a setup and so did some others.
Obviously Ive tried repeatably two settle this behind the scenes but have been told by KG two go take a jump.
I thought I might get slightly better service being a big client, he did offer two re barrel the gun but buy then no one wanted a 300.
I'm $5500 out of pocket for this gun, and having two buy it back from the new owner will leave me more out of pocket.
Any how that's the facts guys take it how you will.
Please be safe out there, if Ive learn't one this its that a few extra scope clicks never killed anyone.
Here is one of the reports on the gun.
300 Rifle and Ammunition Evaluation
Rifle Evaluation
Firstly evaluation with the bore scope showed a seriously fire cracked throat that we would consider shot out, and would expect to have fired in excess of 300 rounds of a very over bore cartridge loaded to maximum 65,000psi pressures. See photos. This fire cracking continued 10 inches or so down the bore.
The barrel flutes are 92 thou deep, leaving a core/wall thickness of 92 thou, that’s about 2 mm. The barrel makers who are prepared to push core thickness like Tim North from Broughtons tell me they won’t go less than 150 thou. We’ve accidently tried it as thin as 100 thou, and got lengthwise stress cracks and the throat/barrel gave up the ghost early due to the extreme flexing under peak pressure - that was in a TrueFlite barrel. Now Remington’s steel may be better stress relieved and softer, so may stand it for longer, but those extremely deep flutes that finish abruptly with no runout are creating real fracture points and asking for trouble in our opinion.
The flute depth was also not consistent, and varied by 24 thou in depth around the barrel.
The M16 extractor has been incorrectly fitted and it is sitting proud of the bolt diameter and must have been dragging in the front receiver ring. So instead of refitting the extractor at the correct depth, or taking a cut across it to bring it back down to flush, the front receiver ring has been bored out from the front to get it to clear, reducing the height of the lug abutments and the locking lug surface area, and removing the very section that is s’posed to hold the front of the bolt in alignment. There is about 14 thou aside of clearance, and the bolt rattles around in there like the proverbial …. in a sock.
Then a huge clearance has been bored around the bolt nose in the barrel counter bore, creating a ridiculous 62 thou of clearance right round the nose. The counterbore has also been bored too deep, with 54 thou of clearance on bolt nose, needlessly increasing the amount of unsupported case poking out of the chamber. Both these clearances are ideally kept to a minimum - so much for the Remington three rings of steel!
The barrel has been set back maybe a few hundred thou, and there is a large tenon thread runout groove, and combined with the undercutting of the rear section of the tenon thread with the oversize bolt counterbore, its effectively left only about .375” of properly supported thread length to hold the barrel in. The barrel was barely hand tight, possibly due to the small amount of real thread contact left settling a little under the excessive pressures it’s been subject to.
With the machined tenon and muzzle running true, the chamber and bore runs out significantly by about 4 thou at the front but only 1 thou at the rear. So it is neither parallel nor in line.
Ammo Evaluation
The powder charges weighed 111.2gns, plus or minus .1gns. The BTO’s varied 11 thou from long to short. The total cartridge runouts averaged 8 thou. The headspace varied 3 thou. The BTO was a 40 thou jump, so more than generally recommended, but may have started off about 10 or 15 thou and the throat may have lengthened.
Pressure/velocity test:
3130fps av for 71,500psi av, 35fps ES.
Average group size 1.5 inches.
Had to drop to 107.5gns of Re50 to get a safe 3040 fps for 65,000psi av.
Then tried US 869, #2064 did 3150fps for 65,000psi, just as it does in our 300 FX, #2066 did 3100fps for 65,000psi.
Rifle didn’t shoot any of the loads well, but shot tightest with the 869 load but still lost the odd shot as we’d expect looking at that throat.
If loaded to a genuine 3175fps with Re50, the pressure would have been in excess of 75,000psi and that may well be where the throat has gone. We fired 15 rounds total in our evaluation.
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