RMR'S 69 grain .224 bullets.

longdayjake said:
Some guys really like the 3gh and others don't. I'm not really sure what the difference is because out of all my guns I've been able to get 1/2" at 100. But my guns are pretty high end. I will say that mixed range brass and #41 primers give terrible groups for me. I could shoot 3 shots touching eachother and then one will be an inch away and my SD will be all over. I hate this because I still have a ton of pulled LC cases that just won't produce great groups so I have to reload them with better primers. Once they've been fired and reprimed they will shoot great. But not before.
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It's not really practical in pulled brass, but I've had the lowest SD's by sorting primers by weight. I was using Fiocchi SRM, which should not be very remarkable, but when I sorted them by weight, I got single-digit 5-shot SD's. Of course, I had to trickle charges too. That was H335.

I just picked up 3000 Win. #41. I'm hoping they're good for me because I don't want to sort them by weight. I'll compare them to CCI BR4 or Fed. GMM and see if they'll be for plinking or for keeps. I'm not expecting 1/2" either way (don't have the rifle), but how about an SD of 25 or less.
 
I've shot the 69gr RMR thru two different Savage, one a Model 10 with 22" barrel and one a Model 11 with a 26" Model 12 Varmint barrel. Both are 1:9 twist. The Model 10 shoots them very well and two winters ago I shot with them in our winter rifle league. The Model 12 barrel absolutely detests them. Go figure.

I have shot them with TAC, A2460, Benchmark, RL17 and BL-C2. Best results was with the A2460.
I just passed 20 along to a friend to try in his new Ruger.
 
W.E.G. said:
Velocity is highly overrated for hobby shooting.

Decent accuracy is all that matters.
Click to expand...
I bought a 28" barrel for my AR so that I could really reach out there. I'm getting 3150 fps from the 69s and about 3075 from the 75s with some of my loads. Velocity only matters when you're really trying to reach out there with the .223. I use my .223 as a bonus gun for 3 gun matches where everyone else uses 6.5s or 6 mms. I'll tell you that there were a lot of guys blown away when I went 5 for 5 at 700 yards within just a few seconds. The biggest issue is .223 doesn't hit hard enough for ROs to spot hits very well but when they have the flashers on the targets I can hit them faster than they can pick up the shots. Sometimes I will hit a target 7 times before they finally count the 5th hit but it's still faster than racking a higher recoil bolt gun.
 
I have shot a lot of RMR 75 gr. Fmj and Hornady 75 jhp bullets in my Ruger SR 556 with 20 inch barrel. Recently bought 1000 RMR 75 jhp bullets. Loaded enough to test in the SR556 and my #1V. Also my son recently bought a Ruger AR 556 with the carbon fiber barrel. When the weather cooperates there will be some testing happen.
I am using loads that worked in the past for other 75 gr. In my 223s for the new batch of RMR 75 jhp bullets.
New Winchester brass neck sized in Bonanza BR dies, BR4 primers and 3 different powders.
4064 22.5 gr.
AA2495 20.0 gr.
AA2015BR 21.0 gr.
All the bullets were seated to clear the AR magazines except the ones for the #1 which are .010 off the lands.
Now just waiting on decent weather.
 
longdayjake said:
As far as TAC goes, most guys have told me that their best results have been at 24.4 grains. That seems to hold true for me as well. However, I like to push the limits a bit and I will pump it up to 25.3 grains if I want to get the most velocity I can. That gets me some really high velocities and hasn't yet blown any primers. I will say that H335 will get higher velocities though.

Some guys really like the 3gh and others don't. I'm not really sure what the difference is because out of all my guns I've been able to get 1/2" at 100. But my guns are pretty high end. I will say that mixed range brass and #41 primers give terrible groups for me. I could shoot 3 shots touching eachother and then one will be an inch away and my SD will be all over. I hate this because I still have a ton of pulled LC cases that just won't produce great groups so I have to reload them with better primers. Once they've been fired and reprimed they will shoot great. But not before.
Click to expand...

Ive had great results with mixed year LC brass, CCI 400s, and 8208 with the RMR 69s. SDs are averaging around 10 with that setup. 3000 FPS from a Criterion 8 twist 24" barrel. Great load even at 600 yards. Zero issues with a 6" plate at 600.
Ive never found 41s to help accuracy. There is a thing as too much spark IMHO. A standard rifle primer is more than enough to light off anything in any weather when it comes to 223.
 
I tried different OAL's and 2.260 seemed to be the most consistent with the 69 3GH, but I could have one 5-shot group shoot 1/2 minute and the next would shot 1.5ish.

20240113_091733.jpg


77 SMK blems from the same gun
20230522_140203.jpg
 
CoalCrackerAl said:
The TAC data has the OAL at 2.260. I think 2.250 is max for my AR mags. I too love TAC. H335 is my second fave. The data for H335 is under 2.250. So i'll go with it. 👍
Click to expand...


0.010" difference in OAL is completely insignificant, except if you load ammo 0.010" TOO LONG, you may run into feeding problems due to the nose of the bullet dragging on the front of the magazine.

And it could matter too if you are loading extra-long, and 0.010" is the difference between jumping the bullet, versus jamming the bullet.



I learned about excessive overall-length by experience on 9/11.

The hijackers flew the stolen plane over my kid's school, then crashed it into the Pentagon a couple miles downrange. I went to the school, and signed the kid out for the day. Reason for early departure in the log: "WAR." Went back to the house and started (trying to) load my match ammo into 30 round magazines. There I discovered that the 2.260" ammo loaded with Sierra 69's, and which worked fine in my 20-ROUND magazines I used for competition, was excessive overall length for my 30-round magazines. I suck at being prepared for war. Me and the kid then drove over to the Potomac Yard strip mall, and got Subway sandwiches and cookies, and watched the Pentagon people plod past us as they tried to find their way home. WTOP radio blaring on all the radios of the parked cars in the lot.

Always keep a case of BALL ammo on hand for those days when you don't have time to "bump" a load-out of mags to just to be able to get the round into the mags.

Each 0.001" change in overall length of 5.56 ammo changes pressure about 50 PSI.
Which is roughly one thousandth of 1% of total pressure for 5.56

If you trust Quickload:
A 69 with 24.2 grains TAC, and seated to 2.250" makes 56,621 PSI.
A 69 with 24.2 grains TAC, and seated to 2.200" (50 thouandths deeper) makes 59,075 PSI.
 
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I loaded up a couple 100 of these along with some 75 and 77 gr 2nds from Midway. I threw a red dot on my new PSA and without magnification, I realize how bad my 45 year old eyes are. Still decent groups with no magnification at 50 yards. One thing I did notice is the 69 gr RMR bullets are slightly less diameter than my other .224 bullets and measure .2235. They have less neck tension than most of the others I have shot but still shot well. Bottom left group is the best 5 shot group I got with the RMR so far. Ill test them with a scoped gun eventually to really see what I can do with them.
 

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Stevenvalleyky said:
I loaded up a couple 100 of these along with some 75 and 77 gr 2nds from Midway. I threw a red dot on my new PSA and without magnification, I realize how bad my 45 year old eyes are. Still decent groups with no magnification at 50 yards. One thing I did notice is the 69 gr RMR bullets are slightly less diameter than my other .224 bullets and measure .2235. They have less neck tension than most of the others I have shot but still shot well. Bottom left group is the best 5 shot group I got with the RMR so far. Ill test them with a scoped gun eventually to really see what I can do with them.
Click to expand...

I noticed the diameter on the 69 3GH was smaller as well. It made me wonder if that is why it shoots better in one barrel over another.

The best groups I have ever shot with them were from clean, cold bores, in two different rifles.
 
longdayjake said:
As far as TAC goes, most guys have told me that their best results have been at 24.4 grains.
Click to expand...

I'm pumping out 69 RMR ammo with 24.2 grains of TAC like its going out of style.

Which it may be. Have you seen the prices of TAC just lately? In fact, have you even seen any TAC lately? Something happend.

Meanwhile, I just ordered up 16 pounds of this pulldown powder to spank those 69 RMR's.

25 jugs still in stock.

Down from 32 when I started pimping it a couple hours ago.

Git sum!

www.cdvs.us

223 pull down powder this powder is pull down powder.

Combat Disabled Veterans' Surplus is available for purchase. There will be a $37.50 Haz-mat cost plus shipment for the powder, which comes in 8LB jars.
www.cdvs.us
 
W.E.G. said:
I'm pumping out 69 RMR ammo with 24.2 grains of TAC like its going out of style.

Which it may be. Have you seen the prices of TAC just lately? In fact, have you even seen any TAC lately? Something happend.

Meanwhile, I just ordered up 16 pounds of this pulldown powder to spank those 69 RMR's.

25 jugs still in stock.

Down from 32 when I started pimping it a couple hours ago.

Git sum!

www.cdvs.us

223 pull down powder this powder is pull down powder.

Combat Disabled Veterans' Surplus is available for purchase. There will be a $37.50 Haz-mat cost plus shipment for the powder, which comes in 8LB jars.
www.cdvs.us
Click to expand...
I've shot a ton of SMP 735 over the last 8 years. It's a fast powder but still does well behind the heavier for caliber 224 bullets.

On edit: H322 data works well for SMP 735.
 
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