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Joined: Aug 2015
Posts: 13,297 Likes: 6
Campfire Outfitter
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Campfire Outfitter
Joined: Aug 2015
Posts: 13,297 Likes: 6 |
Not above book, Hodgdon's 8208 XBR MAX load for a 77SMK is 23.2 gr. and 2,796 fps. Western Powders, TAC, MAX 23.4 gr at 2,759 fps Hodgdon, Benchmark MAX, 22.8gr at 2,763 fps Its above book for ar comp. Go back and read my posts. Did you go to school in Nevada? Is everyone from Orygon an asshat?
Let's Go Brandon! FJB
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Joined: Jul 2005
Posts: 23,540 Likes: 2
Campfire Ranger
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Campfire Ranger
Joined: Jul 2005
Posts: 23,540 Likes: 2 |
Unfortunately that Alliant data is for standard 223. I never messed with AR comp with the 77gr TMK. But i have used it with 75gr ELD-M. I used hornady data for the 80gr Eld-m max was 23.2. I used 23.5gr with the 75gr eld-m. .
Last edited by 79S; 04/13/20.
Then STFU. The rest of your statement is superflous bullshit with no real bearing on this discussion other than to massage your own ego. Suckin' on my titties like you wanted me.
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Joined: Jul 2015
Posts: 14,814 Likes: 5
Campfire Outfitter
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Campfire Outfitter
Joined: Jul 2015
Posts: 14,814 Likes: 5 |
Not above book, Hodgdon's 8208 XBR MAX load for a 77SMK is 23.2 gr. and 2,796 fps. You might want to check barrel lengths. This one in particular is with a 24" barrel. So, subtract 100fps for a 20" barrel, 150fps for a 18".
Politics is War by Other Means
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Joined: Aug 2010
Posts: 48,448 Likes: 56
Campfire 'Bwana
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Campfire 'Bwana
Joined: Aug 2010
Posts: 48,448 Likes: 56 |
Unfortunately that Alliant data is for standard 223. I never messed with AR comp with the 77gr TMK. But i have used it with 75gr ELD-M. I used hornady data for the 80gr Eld-m max was 23.2. I used 23.5gr with the 75gr eld-m. . Dang j, usually you and mm are the ar comp users here. I have the latest sierra manual with ar and bolt gun recipes for the tmk. Funny thing is they suggest 1 in 8 twist and faster, but my 1 in 9 savage shot them very well.
I try to stick with the basics, they do so well. Nothing fancy mind you, just plain jane will get it done with style. You want to see an animal drop right now? Shoot him in the ear hole. BSA MAGA
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Joined: Sep 2006
Posts: 23,678 Likes: 5
Campfire Ranger
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Campfire Ranger
Joined: Sep 2006
Posts: 23,678 Likes: 5 |
hunter and bolt gun recipes for the tmk. Funny thing is they suggest 1 in 8 twist and faster, but my 1 in 9 savage shot them very well. Many times, 1-9" can be a wild card as to what they will shoot................if you really want to shoot a 75-77 grain bullet, you really need to try it in a particular barrel to see of if works or not. I have a M-700, 223, 1-9" that shoots most of them just fine..........depends on the particular bullet too. MM
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Joined: Nov 2006
Posts: 10,197 Likes: 1
Campfire Outfitter
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Campfire Outfitter
Joined: Nov 2006
Posts: 10,197 Likes: 1 |
I think I'm getting 2650 fps with my 77 grain SMK load of 24.5 grains of TAC in my 16" barrels. I've pulled my 77 loads from my phone notes for some reason but I go by the 5.56 pressured loads, not the 223. Sierra always has been very light on their max loads for an AR.
I do remember the 17" Krieger SPR barrel I had got 2725 fps, same as my 18" Noveske SPR barrel.
But unless I'm shooting steel past 600 yards, I'm shooting 55 grain NBT's at 3100 fps in my 16" guns. I have a silhouette at 400 yards that has a heart flapper and a brain flapper, it's pretty easy to make hits on them. 600 is doable if the wind isn't terrible but past that I need lots of help.
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Joined: Sep 2006
Posts: 23,678 Likes: 5
Campfire Ranger
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Campfire Ranger
Joined: Sep 2006
Posts: 23,678 Likes: 5 |
bsa, Go to the Ramshot reloading data page on their website & look at their data. They are one of the only data sites I've seen that show separate data for the same powder/bullets for both 223 Rem & 5.56 NATO pressures. Ramshot DataYou can compare the same bullet/powder combos there & get an idea of how much more typical loads change when one steps up to loading to the 5.56 NATO pressure loads. IIRC, 223 Rem pressure data max's out at around 55K PSI; NATO, while not a SAAMI round, goes to around 62K PSI. I have seen no other data listed anywhere for AR-Comp that is anything other than for 223 Rem; if data for that powder was developed & published to 5.56 NATO pressure, the loading's would be higher. I routinely load AR-Comp with 77 gr SMK & Bergers at 22.8-23.0 gr of powder charge...............and that's about exactly where the guy doing the MK-262 clone testing ended up as well (video that I posted). I think it was Bob Hagel that once said, somewhere, that you never know where the top is until you get there & then back off.................... MM
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Joined: Sep 2004
Posts: 17,478 Likes: 4
Campfire Ranger
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Campfire Ranger
Joined: Sep 2004
Posts: 17,478 Likes: 4 |
“Live free or die. Death is not the worst of evils.” - General John Stark.
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Joined: Sep 2006
Posts: 23,678 Likes: 5
Campfire Ranger
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Campfire Ranger
Joined: Sep 2006
Posts: 23,678 Likes: 5 |
I like RL-15 for several cartridges, & used to use it in the AR loading's but I've phased it out in 223/5.56 in favor of AR-Comp. AR-Comp is a re-formulated version of RL-15 that is more temp stable, finer grained (flows very well) & as re-formulated, came out just a tad faster than RL-15. MM
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Joined: Jul 2005
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Campfire Tracker
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Campfire Tracker
Joined: Jul 2005
Posts: 5,706 Likes: 5 |
I'm using RL15 on the 75bthp, haven't tried it with 77 grainers yet. With the 75 bthp and an 18" 7 twist barrel, my best accuracy with RL15 has been at around 2,550 fps. Any hotter and my groups open up. Some very preliminary loads with leverevolution looked promising with the 75bthp at about 100 fps faster, but more testing is needed. This stupid virus has closed my range down.
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Joined: Jul 2005
Posts: 23,540 Likes: 2
Campfire Ranger
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Campfire Ranger
Joined: Jul 2005
Posts: 23,540 Likes: 2 |
Unfortunately that Alliant data is for standard 223. I never messed with AR comp with the 77gr TMK. But i have used it with 75gr ELD-M. I used hornady data for the 80gr Eld-m max was 23.2. I used 23.5gr with the 75gr eld-m. . Dang j, usually you and mm are the ar comp users here. I have the latest sierra manual with ar and bolt gun recipes for the tmk. Funny thing is they suggest 1 in 8 twist and faster, but my 1 in 9 savage shot them very well. For awhile AR-comp was hard to find last year l. So probably why I never messed with it with 77 tmk..
Then STFU. The rest of your statement is superflous bullshit with no real bearing on this discussion other than to massage your own ego. Suckin' on my titties like you wanted me.
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Joined: Jul 2005
Posts: 23,540 Likes: 2
Campfire Ranger
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Campfire Ranger
Joined: Jul 2005
Posts: 23,540 Likes: 2 |
Yes
Then STFU. The rest of your statement is superflous bullshit with no real bearing on this discussion other than to massage your own ego. Suckin' on my titties like you wanted me.
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Joined: Sep 2004
Posts: 17,478 Likes: 4
Campfire Ranger
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Campfire Ranger
Joined: Sep 2004
Posts: 17,478 Likes: 4 |
“Live free or die. Death is not the worst of evils.” - General John Stark.
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Joined: Aug 2010
Posts: 48,448 Likes: 56
Campfire 'Bwana
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Campfire 'Bwana
Joined: Aug 2010
Posts: 48,448 Likes: 56 |
bsa, Go to the Ramshot reloading data page on their website & look at their data. They are one of the only data sites I've seen that show separate data for the same powder/bullets for both 223 Rem & 5.56 NATO pressures. Ramshot DataYou can compare the same bullet/powder combos there & get an idea of how much more typical loads change when one steps up to loading to the 5.56 NATO pressure loads. IIRC, 223 Rem pressure data max's out at around 55K PSI; NATO, while not a SAAMI round, goes to around 62K PSI. I have seen no other data listed anywhere for AR-Comp that is anything other than for 223 Rem; if data for that powder was developed & published to 5.56 NATO pressure, the loading's would be higher. I routinely load AR-Comp with 77 gr SMK & Bergers at 22.8-23.0 gr of powder charge...............and that's about exactly where the guy doing the MK-262 clone testing ended up as well (video that I posted). I think it was Bob Hagel that once said, somewhere, that you never know where the top is until you get there & then back off.................... MM Yeah, one of my barrels shot them at 2744 fps avg. Weird because my savage bolt gun wasnt shooting them that fast, even with slightly more powder. I wasnt getting any serious pressure signs in that rifle, but was more than a grain over max listing.
I try to stick with the basics, they do so well. Nothing fancy mind you, just plain jane will get it done with style. You want to see an animal drop right now? Shoot him in the ear hole. BSA MAGA
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Joined: Jul 2005
Posts: 23,540 Likes: 2
Campfire Ranger
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Campfire Ranger
Joined: Jul 2005
Posts: 23,540 Likes: 2 |
24.5gr of RL15 I used CCI BR primer but probably could use cci 400. Bullet seated to 2.250, in LC brass
Then STFU. The rest of your statement is superflous bullshit with no real bearing on this discussion other than to massage your own ego. Suckin' on my titties like you wanted me.
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Joined: Sep 2004
Posts: 17,478 Likes: 4
Campfire Ranger
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Campfire Ranger
Joined: Sep 2004
Posts: 17,478 Likes: 4 |
“Live free or die. Death is not the worst of evils.” - General John Stark.
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Joined: Apr 2011
Posts: 15,380 Likes: 13
Campfire Ranger
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Campfire Ranger
Joined: Apr 2011
Posts: 15,380 Likes: 13 |
Remember that Alliant's info does not list a range of loads, only one, & that is labeled as 223, not 5.56. Here's a link to a large series of tests (about 12 episodes) attempting to duplicate BH MK-262 that you might find interesting...............be sure to look of the one that shows the data for the factory BH MK-262 (77gr SMK). In most cases, my data very closely resembles what he is getting. MM BH MK-262 testing8208 & AR-Comp4895 & MR-2000That’s where I got the idea to try LVR from. He has a pile of data on his pages.
Semper Fi
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Joined: Jul 2005
Posts: 23,540 Likes: 2
Campfire Ranger
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Campfire Ranger
Joined: Jul 2005
Posts: 23,540 Likes: 2 |
Remember that Alliant's info does not list a range of loads, only one, & that is labeled as 223, not 5.56. Here's a link to a large series of tests (about 12 episodes) attempting to duplicate BH MK-262 that you might find interesting...............be sure to look of the one that shows the data for the factory BH MK-262 (77gr SMK). In most cases, my data very closely resembles what he is getting. MM BH MK-262 testing8208 & AR-Comp4895 & MR-2000That’s where I got the idea to try LVR from. He has a pile of data on his pages. I just need to pull the trigger and buy a WOA barrel in 223 Wylde. His accuracy improved tremendously when he made the switch.
Then STFU. The rest of your statement is superflous bullshit with no real bearing on this discussion other than to massage your own ego. Suckin' on my titties like you wanted me.
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Joined: Apr 2011
Posts: 15,380 Likes: 13
Campfire Ranger
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Campfire Ranger
Joined: Apr 2011
Posts: 15,380 Likes: 13 |
Remember that Alliant's info does not list a range of loads, only one, & that is labeled as 223, not 5.56. Here's a link to a large series of tests (about 12 episodes) attempting to duplicate BH MK-262 that you might find interesting...............be sure to look of the one that shows the data for the factory BH MK-262 (77gr SMK). In most cases, my data very closely resembles what he is getting. MM BH MK-262 testing8208 & AR-Comp4895 & MR-2000That’s where I got the idea to try LVR from. He has a pile of data on his pages. I just need to pull the trigger and buy a WOA barrel in 223 Wylde. His accuracy improved tremendously when he made the switch. I’m sure. I guess if I am replacing barrels I’d go with a Krieger or similar that I’d use in my bolt guns. Do the WOA barrels shoot better than those would?
Semper Fi
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Joined: Sep 2006
Posts: 23,678 Likes: 5
Campfire Ranger
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Campfire Ranger
Joined: Sep 2006
Posts: 23,678 Likes: 5 |
I just need to pull the trigger and buy a WOA barrel in 223 Wylde. His accuracy improved tremendously when he made the switch.
For the money, they are a great buy.............you probably won't find much in their price range that has been lapped; I have 3 of them. But the Criterion & the button rifled Rock Creek barrels that Craddock uses are about the same or better for around the same price range, maybe a little bit more. And he is just great to work with of you want something in particular. MM
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