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Chanonry

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About Chanonry

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  1. Chanonry

    Adjustable Comb

    except a wife....
  2. I found this useful... Which bipod
  3. Chanonry

    Muzzle tread ?

    M18x1 is a common threading. Just buy one.
  4. Chanonry

    First focal plane for stalking?

    I think this is one of those topics that divides people depending on their personal preferences, so not sure how much help this is really but... The rifle I use for stalking has a Kahles ffp on it. In reality its mainly used on the range (UKD) with some shots at deer. Stalking is split between woodland and hill. Most of the hill stalking is hind culling. So up the hill, it is great. I can set the mag to give me a decent field of view and the reticle is still correct. That matters as I hold for the wind and for follow up shots I can make some fast but small adjustments if the deer run a bit further out. The fov is important so I don't have to come off the rifle for the next shot. The fact the reticle is always true lets me shoot a bit more dynamically on the subsequent shots and I don't have to be at 22x or whatever if I am going to use the reticle at all. In the wood though that's a bit of a waste of time. Ranges are not far enough to worry about those sorts of adjustments, wind is largely irrelevant and to get the FOV right, it is dialled right down almost to a cross. This is why some people HATE ffp. Personally I don't really care as they are so close a cross is all I need. In some ways that is what the reticle is 'telling' me. On the Kahles the thickness is fine, the trade off is it is a bit chunky at 25x but most of the time I am in the teens and if I am at 25x then the centre dot is ideal. I have a mate who is a professional stalker who detests FFP and is happy with the idea of memorising reticle sub tension values at full and half power. In return he gets a consistent reticle at all magnifications. For me this is an accident waiting to happen as I have forgotten where the magnification is set on my NXS on the range before and it takes a while for me to realise why I am missing. I am sure I could manage this if I was a bit more diligent in my drills as I assume he is. Kills too many deer not to be. For me, my view is that I don't need a scope in the woods at all and in fact they are a hinderance for close shots. A good red dot will do the job out to 150 certainly and with a little bit of shooting 200, calibre dependent I suppose. But that wasn't the question....
  5. Magnetos are quite sensitive to how close they are to the bullet on exiting the muzzle. Nobody wants to shoot it but you have to set it up quite close to reliably register shots. Its a one time fiddle as once you know the proper set up you just use the same bits and you are good to go. I had 2 Chorny's. Far too fiddly, never entirely sure the results were right and I shot them both. Had I not bought a magneto I would have used a bullet with a Litz bc, measured drop at say 400 and fiddled with JBM to derive the mv. I have to verify/tune anyway, so not sure it would be much of an imposition. I can reload a lot of ammo for £300. Its handy though.
  6. Chanonry

    Browning x bolt.

    Not really. If you have definite features/performance in mind it is easy. The majority of production rifles have features which are more about cost than function and if you don't want to accept that then there is a bit of a hunt for a rifle that does not compromise in areas that you deem important. Combine that with calibre choice and off you go.
  7. Chanonry

    6.5 PRC

    What is it that the PRC gives us that we can't already get ?
  8. Chanonry

    7 SAUM dies

    Anybody got a set idly sitting in the cupboard ?
  9. Chanonry

    1st shot in a string velocity

    Because if the trend of a fast first shot shows up on both instruments then it is a reasonable assumption that this it is a real phenomenon even if the absolute velocity values on the two instruments are different. If the trend on the first shot does not show up on both then this increases the probability that the trend is itself suspect. Given this is an unusual phenomenon it would then be reasonable to be a bit suspicious of the data from the Labradar. Occams razor. It could just be a statistical anomaly of course in which case shooting a heap of groups would see it disappear
  10. Chanonry

    1st shot in a string velocity

    Verify the instrumentation Borrow a magneto speed. Fire with both magnetospeed and labradar at the same time. See if the trend persists
  11. Chanonry

    Powder Temp v MV

    If we are getting pedantic we don't really know what the inputs were (ammunition and chamber temps) to associate with the output i.e. mv measurements. We have some qualitative input data and quantitive output data but only a minor change. So usual stuff: How large were the sample sizes? Is the data correct but just represents a different sample from the ammunition batch. In other words are the sample sizes large enough to highlight a statistically significant change in velocity. If not then maybe you should just average the numbers. In reality it is probably not valid unless you were unusual in the shooting world and shot a really large sample. Nobody else seems to. 21 C and 25 C are not big shifts so can the velocity effects be measured accurately or are other effects interfering. I take measurements when it is 'cold' and when it is 'hot'. You will get a more representative result. Really you want to take measurements at the high and the low, then you can be reasonably sure it is accurate between the two, the further you get outside those limits the less certain you can be it is correct? To be really pedantic, you see some of the guys in videos from the US using a thermal temperature instrument to measure ammunition AND chamber temperature. So you would have control over the input therefore be better able to interpret the trend (or lack of). Life is too short...
  12. yes you did say that twice. So what ? Are you implying that it has no effect on the hearing of the people close to you ?
  13. They REALLY annoy the guy next to you. "The blast from a muzzle brake isn’t noticeable to the shooter" - not so sure about that one, maybe it depends on the brake ? How about using a can? No annoyance and some recoil reduction. Not as effective as a brake granted, but still good IMO.
  14. Happened to look at this last night. According to Quickload my 308 load in a 20" barrel has a residual 8 kpsi while a 7 SAUM was about 12 kpsi in a 25". Not quite sure how that relates to what the mod experiences...
  15. I see what you are saying and why but I don't think I would be betting my house on it. The chatter is exactly that, chatter; and the study does not look statistically valid. To be fair to the guys that did it, they actually say that themselves in their comments about sample size. Looking at the standard deviations and the changes in velocity, they are so similar at the longer barrel lengths that you could prove anything you wanted. Some of the numbers also just look odd which demonstrates the problem. As the numbers don't go beyond 30" and are dubious close to that value, I don't see how anyone can make any informed comment at all never mind a definitive statement. Still it is better than nothing? Maybe not. The other point in the thread in general I don't really get is the apparent belief that once the powder is burnt then any extra barrel is a waste. Well if the bullet still had 30 kpsi or whatever up its chuff it is still going to accelerate so the extra inches are worth while ? I have not run quickload on this cartridge but on others that I have the powder burn often finishes well down the barrel and the residual pressure adds a lot to the final muzzle velocity
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