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RobertH

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    New Forest, Hampshire

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  1. Hullo. I was perusing some old load data and targets this evening over a delicious Malt, when I came across this particular half inch grid target (nothing spectacular) which made me pause and lead me to ask this (I hope not embarrassing) question; As all the rounds are roughly in the bottom right quadrant making it pretty much a half a minute group: Does this mean that a half minute group is four times better than a 1 minute group, or do we have to start getting Pi involved and diluting things further? You can tell I'm bored!
  2. Very true Bruce. I use the Hornady collet tool set as lightly as possible, but yes there are always some witness marks. I'm pleased at least to have learned from it.
  3. Thanks both, it is a comfort! I’ll shoot them as plinkers and start again. It’s strange my memory tells me I re-neck sized them, but as that would involve popping out a live primer, I probably just rethrew the new charge, reseated and crimped them. At least from now on my reloading notes are going to be more comprehensive!👍
  4. Thank you both for your helpful replies, it seems I have an embarrassing but interesting outcome. I stripped the rifle down last night and measured the stock and metalwork separately. I was primarily interested in what I have read on several sites about the bottom metalwork touching the receiver, thinking maybe they are contacting in such a way as to cause rocking or insufficient clamping force instead of clamping solidly to provide an adequate platform for the barrel. (this didn't appear to be an issue as my measurements suggested there was some .023" clearance between the top and bottom metal bits) Despite pulling the rifle apart three times and careful reassembling, at one point removing the nasty split-pin pillar on the rear action screw, and every time using your technique Lantohorse, of putting it together with the magazine in place (Good tip!) it still shot badly. So, here's the embarrassing and interesting bit about which I'd appreciate some suggestions! The Rifle is in 223 and I developed two 60 gr V-max loads last autumn using the OCW system that, the last time I had need of the rifle, shot into less than .3 minute. If anyone's interested, one used Viht's book max of 24.7 gr of N133, but I settled for the other slower, more comfortable but just as accurate 23.8 grains of N133 (both at a coal of 2.215") which is quite short and a compressed load. No pressure signs and an average MV of 3086. Anyway, (please stay awake!) I made up 100 of these rounds with five times fired and neck sized Norma brass, together with 100 brand new Lapua cases. BUT, I had previously made the 100 Lapua cases up into the 24.7gr book max loads that chronographed at an average 3200 fps. A blistering, very accurate round that was nevertheless a bit of a flincher. So I pulled the remaining bullets, about 85 and reloaded them to exactly the same specs as the norma load. These are the rounds I have been using yesterday and today, until I thought to take out and try the Norma rounds which shot impeccably back into .3 minute. Why would a brand new case using a pulled bullet shoot a group of between 1.75 and 2 minutes compared to a neck sized one producing .3? I still can't quite get my head around it. Anyway I am still considering bedding as a method of eliminating more variables. If you've managed to stay awake, I thank you. Answers on a postcard etc.................
  5. Thanks for that Furyan. I've seen some of his vids, informative and entertaining. I'll certainly have a look at those. I'm concerned about messing up a pretty stock, did you find it relatively painless?
  6. I hope all of you are are well. I have a walnut stocked CZ 527 that I believe suffers from climatic changes, and would perhaps respond to a bedding job. Basically I develop a group which shoots wonderfully, which when the rifle is next used two months later looks like a pattern plate. A bit of random, uneducated tweaking with the stock screws, and it seems to be back on song. I have read that the 527 action can be tricky and fiddly to install (With which I agree), and also I have heard conflicting reports regarding whether the magazine well of the CZ 527 should contact the action/receiver or not. I would greatly appreciate some thoughts on how to proceed. Thanks in advance, Robert
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