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I am building 6,5-284 for a comp tomorrow morning, once that is done I will fall back on the AR, Christel just weighed the bullets I have and the two batches are both 55 grains, one is Remington, the other unknown - I will post some pictures of them probably this evening.

I have ended up building with 73 Grain Bergers at 2.265 which means I can feed from the magazine. I will be shooting: 23, 23.5, 24, 24.3, 24.6, 24.8 and 25 grains of TR140, plus the same(ish) with N140. The plan is to shoot side by side N140 and TR140 and look for changes in the POI and pressure signs, my interest being more in the latter, once I know where the upper limit with the powder is I can work back. I will be taking it easy as I have no idea how robust these things are.

These are the 55grain .224" bullets I have
.754" for the left (Unknown) and .716" for the right (Remington)

Not sure on the 55gr bullets but I'd use the Bergers anyway. N540 from your current stock would be my choice.

However , for everything lighter than that 73gr, I'd load a faster powder.

Was shooting my brother's (in USA) smith and wesson carbine, taught him reloading and we used IMR 8208XBR to quite good effect with a 53gr vmax, and also under a 75gr Hornady HPBT. That particular rifle only likes things HOT mind, so the minimum loads and most workups weren't great. The higher end loads were good mind.

H4895 is another personal favourite in 223.

ovenpaa, I just checked the manual and measured one I have here (.754) and I'd say that the one on the left is a Sierra bullet. None of the powders you have are listed in their manual. Their accuracy load is 21.5grns of RE-7

Blu

Cheers Blu.

Had a chance to get some range time in this morning. The Berger 73g run with 25 grains of TR140. CCI BR primers built to an OAL of 2.265" did not cause any problems. The primers are stating to flatten with some flow however extraction was fine. As a comparison 24 grains of N140 looks the same as 24.6 grains of TR140. I did not have access to a Chrono so this was a very rough observation.

I would expect to be able to move to 25.2/24.3 grains of TR140 at 2.265" as an absolute maximum load for my rifle. I need to investigate further...

The weather was also somewhat warmer than normal - so in colder weather that load would be even safer I believe!

What was the accuracy like?

Accuracy? It was on the frame and that is all I will say at this stage.

:lol:

Note he never said which frame

nice to meet you this morning OP, always good to put a face to a name

TW