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195 gr TMK in 30-06

12 May 2022
@ 12:47 pm (GMT)

Ramon Palmer

I was encouraged by Nathan a while ago to try this projectile in my Bergara B14 and thought i'd share my initial data here. I loaded up 10 rounds at 20 thou jump using AR2213SC to find a velocity node.

59.6 = 2671
59.9 = 2699
60.2 = 2704
60.5 = 2726
60.8 = 2732
61.1 = 2710
61.4 = 2704
61.7 = 2754
62.0 = 2737

I'm aware that the velocity goes up and down a bit, perhaps this is due to inconsistent powder metering. I ended up settling on 60.7 grains as it seemed to be a stable spot

My question to those who have experimented with this projectile is to do with seating depth. I was planning on starting at 20 thou and increasing the jump by 5 thou for each group. Perhaps it would be worth loading up a group at 10 and 15 thou jump as well?

Any input would be welcome.

I don't have my CBTO on hand right now but I'll put it up when I do

Replies

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13 May 2022
@ 08:13 am (GMT)

Nathan Foster

Re: 195 gr TMK in 30-06
Hi Ramon, thanks for sharing your results. My concern is that you are getting very high velocities from a 22" barrel. The inconsistent velocities may be as a result of high pressures.

Also, while I very much like ADI powder, the 2213sc burn rate is slightly too fast for 195gr - 208gr bullets (regarding sizzling speeds) while 2217 is slightly too slow (cannot fit enough in the case). If using ADI 2213sc, you may want to look to a lower node in the high 2500fps range from this barrel length. Perhaps see if that helps a bit. I do not believe there are many other powders (no between burn rates) about to choose from at the moment due to supply shortages everywhere.

For now, reload your brass and see how the primers seat, some may already be loose. Load up again, starting at 56.5gr, three shot groups to 58.5 (book max for a 200gr is 57.5gr). Also, please be leary of ladder testing. I know it is very popular, but so is wearing pants that make a man look like he has just shit himself.

OK, hope that helps a wee bit. You might be lucky and it might be a fast rifle, but do play it safe.
13 May 2022
@ 08:36 am (GMT)

Ramon Palmer

Re: 195 gr TMK in 30-06
Hi Nathan,

It’s a 24” barrel, should have mentioned that. I had some RL22 but as you know, it’s impossible to get at the moment so this was the closest burn rate I could get.
13 May 2022
@ 09:20 am (GMT)

Nathan Foster

Re: 195 gr TMK in 30-06
OK, this might be an annoyance but when you get time, could you please physically measure (or re-measure) the barrel length, just to be sure. The Spanish maker is not so keen on long barrels, not even in the magnums.

If the barrel is indeed 24", you may still need to go easy with 2213sc above 2650fps. You'll soon find out what the limit is anyway, you have some fired cases / primer pockets to study from your 2700fps loads.

Yes, hard to get much in the way of powder now. One could add some versatility by going the AI route at this time with regards to a new build.
13 May 2022
@ 08:09 pm (GMT)

Ramon Palmer

Re: 195 gr TMK in 30-06
Hi Nathan,

The barrel is a true 24” from muzzle to bolt face, I measured this afternoon. I will load up some more rounds as per your instructions to look for some more consistent velocities and let you know the results.

I never had any obvious signs of high pressure at the higher loads, but I have just shot some groups at 60.8 and had high extreme spread and trouble with consistent seating depth. Hopefully these issues will be resolved with a lower charge.

Hopefully this data is useful to someone, particularly in NZ at the moment as there only seems to be ADI powder available and 2213sc seems to be the closest we can get to the right burn rate for these 195 gr TMK projectiles.
14 May 2022
@ 08:49 am (GMT)

Nathan Foster

Re: 195 gr TMK in 30-06
Hi Ramon, thanks for going to the trouble to measure that, it provides the correct context for myself and will help others.

Those with a 22" barreled rifles need to interpolate / adjust the above results by minus 70fps.
22 May 2022
@ 08:38 pm (GMT)

Michael Seager

Re: 195 gr TMK in 30-06
Hi Ramon,

Don't know if you are somewhere you can get Reload Swiss Powders? They walk very closely with the Alliant Powders.

For heavy bullets in my 7x64, RS70 is great and a good substitute for RL 22 type applications.

Best wishes,

Mike
26 May 2022
@ 08:13 pm (GMT)

Ramon Palmer

Re: 195 gr TMK in 30-06
Hi Micheal,

Here in NZ we pretty much just have ADI powder at the moment. Hopefully soon the Alliant powders will start to come back
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