Rokslide Special 223 recipe

[B_Reynolds_AK]

I am not sure if other chambers differ, but in my tikka it seemed to shoot just as good at mag length as it did seated out further. I would just load to book OAL and go, unless you are using varget and need the extra room for powder. Believe the TMK profile is designed well for jumping plenty.

Copy that. I suppose with the factory Tikka barrel that is throated fairly short, 2.26 oal is probably fine with the TMK’s.
I was going to try N150, as recommended by @Marbles.

 

[Lawnboi]

I’m just about to start reloading 77 TMK’s for my new Tikka.

I’ve been using SAC comparators for both headspace and to find ogive length for my 6 CM.

I will for sure pick up the headspace comparator for the 223.

Question: Should I worry about CBTO on the 77 TMK’s or just load to OAL and not worry about ogive?

It’s not a terrible idea to have a cbto comparator for 22 cal on hand. There’s more uses to it than just measuring cbto of loaded rounds.

Also depends on your chamber. I’d never assume your freebore is what it is, I like to measure.

Nice tool to have for not much money. Honestly the sac cbto measurements are almost equal to my rifling in that I can guesstimate now where to put the bullet.

 

[Juan_ID]

Copy that. I suppose with the factory Tikka barrel that is throated fairly short, 2.26 oal is probably fine with the TMK’s.
I was going to try N150, as recommended by @Marbles.

I did measure my chamber but it did me no good as I was restricted by the factory mag. For both tmk’s and 73 eld’s I load to ~2.26” coal with xbr and they both shoot very well with no tinkering necessary.

 

[UnckleBob]

I don’t think 3 round groups show much of anything. There are numerous threads about it, but getting up to a 10 round group starts to be statistically relevant.

Three round groups are good for testing how a hunting situation might turn out if a follow up shot (or two) is needed. Since I cannot cool my barrel i the field, this test shows how barrel heating will affect my shots. My new Tikka has a light profile barrel so long strings of fire are out.

When I do 10 shot groups, I make sure to keep my barrel temps down by letting the barrel cool. This gives me a better idea of the accuracy of the rifle b/c I don't will never shoot 10 shots at a game animal.

I am going to try some 20 shot groups (see Hornady podcast) at some point with the 223.

 

[B_Reynolds_AK]

My new Tikka has a light profile barrel so long strings of fire are out.

My 25 round group over the course of 60-90 seconds from a factory Tikka would say otherwise.

Edit: It would actually “say” nothing. It doesn’t have to, as it shows it.

 

[Stocky]

c

My 25 round group over the course of 60-90 seconds from a factory Tikka would say otherwise.

Edit: It would actually “say” nothing. It doesn’t have to, as it shows it.


View attachment 808788

Come on! Projectile and powder I might go flirt with some new combos over the break as I finally got some TMKs to try. Although Im happy with the 75 elds thus far

 

[B_Reynolds_AK]

c

Come on! Projectile and powder I might go flirt with some new combos over the break as I finally got some TMKs to try. Although Im happy with the 75 elds thus far

Ha! Factory ADI 55g Blitzking’s.

 

[wind gypsy]

Ha! Factory ADI 55g Blitzking’s.

These things might get too popular and cost more than $0.70/ea if we’re not careful.. used to be sub $0.60 with better brass..

 

[NWBLKTAIL]

This was 20rounds with a SWFA 6x just settled on the red dot and let it fly. CFE 223 gave not very good velocity compared to TAC. Like 2650fps avg. but grouped much better than TAC.
May try TAC with 73gr.Eldm

Edit: 22” stock barrel.

 

[WestTN2288]

This was 20rounds with a SWFA 6x just settled on the red dot and let it fly. CFE 223 gave not very good velocity compared to TAC. Like 2650fps avg. but grouped much better than TAC.
May try TAC with 73gr.Eldm

Edit: 22” stock barrel.

How much TAC are you using? Thats not a whole lot of cfe

 

[NWBLKTAIL]

How much TAC are you using? Thats not a whole lot of cfe

I loaded 20 at 24gr. TAC and 10 24.5gr.
24gr 2830fps avg.

24.5gr 2910fps avg

But both were 2”-2.5” group size

Yes I agree that was not a lot of CFE, probably a moot point on my part to bring up the lack of velocity.

This was all in virgin 5.56 Starline brass and CCI 450, COL 2.330” waters mag

 

[TimberHunter]

For those using TAC powder, how is the temperature sensitivity?

 

[xsn10s]

For those using TAC powder, how is the temperature sensitivity?

If I remember correctly it spikes pretty fast at around 85 degrees. In both my .223 and .308 loads.

 

[FLS]

It is mildly temp sensitive I shoot it year round, 77 SMKs over 24-24.5 grains, and have never had an issue out of multiple gas and bolt guns.

 

[longrange13]

Has anyone got wierd pressure issues adding a can to their 223? My tikka barrel is cut at 17.5”. When I originally did work up in lapua brass I was able to run up to 25.1grns Varget without flattening primers or any other signs. I added a can and had to drop down to 24.1 to get away from pressure. I shot probably 200 at this charge. Bought another can, (exactly the same one), put it on and my next batch at 24.1 is flattening primers. My gun definitely did speed up also. I dropped the charge to 23grns today and am still flattening primers. I see now that Sierra has data published with Varget listing the book max at 22.8 grains I believe. Wonder what is going on.

 

[longrange13]

Fantastic 10 shot group at 24.1 this morning (1/2 dot for reference) Too bad it is running hot now.

 

[TimberHunter]

Has anyone got wierd pressure issues adding a can to their 223? My tikka barrel is cut at 17.5”. When I originally did work up in lapua brass I was able to run up to 25.1grns Varget without flattening primers or any other signs. I added a can and had to drop down to 24.1 to get away from pressure. I shot probably 200 at this charge. Bought another can, (exactly the same one), put it on and my next batch at 24.1 is flattening primers. My gun definitely did speed up also. I dropped the charge to 23grns today and am still flattening primers. I see now that Sierra has data published with Varget listing the book max at 22.8 grains I believe. Wonder what is going on.

I’m not the most versed in cans but I’ve shot 2 different ones on several rifles and haven’t necessarily seen pressure due to the can. But I also haven’t built a load without and then added one. I would think something else is going on with the load


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[mtnbound]

I’m not the most versed in cans but I’ve shot 2 different ones on several rifles and haven’t necessarily seen pressure due to the can. But I also haven’t built a load without and then added one. I would think something else is going on with the load


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I do not see how the can could cause this, but take the can off and shoot it again with the same load.

 

[WhoGarrDen]

I do not see how the can could cause this, but take the can off and shoot it again with the same load.

I agree - chamber pressure should be spiking well before the bullet gets near the suppressor. I don't have a large data set here (3 rounds), but I did have one load that resulted in a stiff bolt lift, and I removed the suppressor just for fun to see if it helped...it did not.

 

[flyfisher117]

Has anyone got wierd pressure issues adding a can to their 223? My tikka barrel is cut at 17.5”. When I originally did work up in lapua brass I was able to run up to 25.1grns Varget without flattening primers or any other signs. I added a can and had to drop down to 24.1 to get away from pressure. I shot probably 200 at this charge. Bought another can, (exactly the same one), put it on and my next batch at 24.1 is flattening primers. My gun definitely did speed up also. I dropped the charge to 23grns today and am still flattening primers. I see now that Sierra has data published with Varget listing the book max at 22.8 grains I believe. Wonder what is going on.

Are you still using the same lot numbers of brass, powder, and bullets?