223 for 600 m shooting

600 with the 69's is pretty easy, from 600 to 1000 is a whole different world. You may want to do your load development at 300 on a calm day, 600 yards is going to be roughly 16-17 moa bullet drop from a 100 yard zero so make sure your scope has enough adjustment unless your running mil-dot of some variety
 
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Mystic Precision said:
Any chance you can give some feedback on effects of varying temps?

Be great if the load is temp stable.

Jerry
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At the -40C we had this week I managed to keep 100 rounds in a 5"x5" box! Will keep you posted Jerry, Barry is helping me with the load development on my Stag 3GL. May go to a higher power optic for this part as the 3.5-10 isn't as conducive to keeping perfect POA as the 32x or 50x we're used to!
 
Depends a bit on elevation above sea level, too. At "normal" altitudes the 62 grain IVI Nato round runs out of poop and becomes unpredictable somewhere after 700 m. I've seen a fellow shoot a 14 inch group out of his 1:9 TR at 1000, at Dundurn range, Sask, but the NATO ammo was all over the place at that distance.
At the Heritage Range outside Calgary in the mountains, I've won a competition with aggregate from 300, 600, 900 m targets using IVI 5.56 NATO out of a Sportco.

At 600 you should be able to predict your elevations with 62-69 grain projectiles, and not have to severely compress the powder or blow out primers.
 
FTRRookie said:
At the -40C we had this week I managed to keep 100 rounds in a 5"x5" box! Will keep you posted Jerry, Barry is helping me with the load development on my Stag 3GL. May go to a higher power optic for this part as the 3.5-10 isn't as conducive to keeping perfect POA as the 32x or 50x we're used to!
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-40C... you are NUTS... in a good way... :)

How far away were you shooting?

If you want to chat about AR loads, send me a PM or email. Finally got around to testing my new Mcgowen barrel and some popular bullet options. No chronie speeds yet but accuracy has been stunning... and very surprising.

Using a SIII6-24X50... at 24X. Love mag way too much ..

Hope things warm up for you.

Jerry
 
Jerry,

I know they say the powders are not temperature sensitive but the shooter sure is! At -40C this is the box I was alluding to:

MTM-RM-100-16T-400.jpg


It's supposed to be warmer this weekend, so hopefully we'll get a chance to get out to do some more testing. Will be in touch.

Cheers,

Scott
 
JasonYuke said:
Going to take the Milcun advances marksmen course
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OK so the question you are really asking is, "should I shoot (several hundred rounds of) .223 or .308 during my Milcun course?". I suggest you ask Milcun for their recommendation. They are a first-rate outfit and I would trust their guidance.

To shoot many hundreds of rounds of good .223 ammo vs. good .308 ammo involves many hundreds of dollars of expense, so this is a reasonable question. Keep in mind though that your ammo expenditure is only a (small!) part of your total cost, you will be spending several days of your time, and your course fees will likely be several times more than the ammo you burn. It won't be a cheap experience, but it will be a very high quality one. Choose whichever ammo is most appropriate for the job, even if it is 1.5X more expensive than something else.

(and BTW there will be some cases in which .223 will be preferred over .308, and vice versa - it's not a question of the more expensive .308W ammo being "better" in all cases).

A great deal of .223/55FMJBT ammo out there is "crap" from a target shooting point of view... that doesn't make it bad or unsuitable ammo, for many purposes ammo that feeds and goes "bang" pretty much every time serves the purpose well, even if it shoots 5" or 6" groups at 100. This also doesn't mean that a .223 is inaccurate, or that 55 grain bullets are inaccurate, or than FMJBT bullets are inaccurate. For example I have shot Nosler 55 grain Ballistic Tip bullets (a plastic tipped bullet with a mild boattail) at 600 yards from a bolt action .223 with a 1-9" twist barrel, and they shot very well (as in, up to target-grade levels of accuracy). They got blown around by the wind more than you would get with a more typical long range match bullet that you would typically use (an HPBT bullet of 68, 69, 75, 77 grain weight).
 
You are taking the Enhanced Long Range Rifle course this June.
Call Linda, and get her advice about equipment.
Unless the course is Service Rifle oriented, an AR may not be the best choice to begin with.

Will no doubt see you there.
 
Was out last weekend shooting 55gr steel match out of my 1:9 twist xcr. 8.2mils. Had no issues ringing a 10x 12 gong with very mild wind at 590
 
I use 75gr steel match from Hornady for long range in my 1:9 twist bolt rifle. I have very good accuracy with 50gr as well but there is a ridiculous difference in wind drift shooting across a field beyond 300+ yards . Although I sometimes alter my rounds, the 75 gr steel match seems to have become my "go to" rounds.
 
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