A buddy and I have been tinkering around with some reloading recently and after a sort of expensive learning curve, we ended up finding the Mk316 Mod 0 recipe which worked perfect since we had a solid line of (relatively) cheap 175gr SMKs and IMR 4064. I was able to aquire some LC machine gun brass through a local shop that is all the same lot and then we've tried both CCI #34 and some Winchester military primers. The load has worked very well for us, landing about .75 MOA out of an LMT MWS and closer to .6 out of my custom R700. Honestly I'm almost comfortable using every component I have with this recipe, but the only thing holding me back from doing it is the fact that once in about every 10 or so rounds, I'll get a flier in a random direction that puts it at about a minute or sometimes a little worse. We're pretty exacting with our loading for our standards and what were expecting, cases all trimmed to within ±.002 case length, powder charge to the tenth of a grain, COAL measured on each round to be within a thousands or so. What would yalls best guess be for that error? Obviously there shooter, but between the two of us and 3 rifles, we can call our shots to be a solid string and still both end up with about that 1/10 figure. Maybe the brass has some inconsistency and we just discard that piece of brass for the next round of loading? I haven't been able to do more loading after firing it from our rifles, so maybe results will differ with a 3rd run. We're very much amateurs so any advice or ideas is appreciated.
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7.62 Mk316-ish hand load expectations
- Thread starter Barrett.
- Start date
I too found a large batch of LC machine gun brass (LC 07) several years ago. As I began processing my brass I added the step of weight sorting the brass. I recall weighing 10 random cases for a weight average then settled with a 1.5 gr plus/minus limit. This yielded a little over 400 pieces. Using Dan Newberry’s OCW method, I found my Mk118 load and was very happy with it.
Later I found a large batch of FC 12 brass. This brass proved to be better in weight consistency than the LC 07.
My rifle has a fairly new barrel (<160 rds) but both old and new barrels, 175 SMK’s, IMR 4064 and FGMM primers along with a bit of attention to the loading process leaves me with a big smile after a range session.
Later I found a large batch of FC 12 brass. This brass proved to be better in weight consistency than the LC 07.
My rifle has a fairly new barrel (<160 rds) but both old and new barrels, 175 SMK’s, IMR 4064 and FGMM primers along with a bit of attention to the loading process leaves me with a big smile after a range session.
The Mod 0 was not loaded at Lake City as far as I know but it actually used Federal Brass and standard FGMM primers.
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Could be normal shot distribution. You could easily be interrupting this "error" incorrectly.
How often are you actually observing this? Recorded sample sizes? Thought: If you printed (10x) 10-round groups, you're saying every single one has a "flier"?
If you're actually concerned with a single component then change out one component at a time and see if it makes a measurable difference. Use large enough sample sizes so you're not fooling yourself.
How often are you actually observing this? Recorded sample sizes? Thought: If you printed (10x) 10-round groups, you're saying every single one has a "flier"?
If you're actually concerned with a single component then change out one component at a time and see if it makes a measurable difference. Use large enough sample sizes so you're not fooling yourself.
Most likely this is the load & shooters' capabilities. How does it do at distance, like 300-600yds?
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