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Normal Topic What 6x45 loads are you guys using? (Read 1404 times)
takbok
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What 6x45 loads are you guys using?
Feb 7th, 2017 at 2:32am
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I'm about to send my Sako 75 A1 in .222 away to get rebarreled to 6x45. I've got a sporter profile Pac-Nor 8 twist cro moly barrel for it. The barrel should end up at about 20.5" long.

I've got some of the following bullets to try:
105gr A-max
75gr V-Max
70gr Blitzking
62gr GS Custom
58gr V-Max

I can seat the bullets to 2.36" (60mm) OAL. I'll be starting with Ramshot XTerminator powder.

I'll post a few pics of the rifle when it's finished, Cerakoted and sitting in my homemade fibreglass stock (Thanks to Stug for the ideas!)

I'm just interested in what loads you guys are using and velocities achieved if you're able to measure them. I've seen one or two posts on here about the 6x45 but there isn't too much info.
  
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Re: What 6x45 loads are you guys using?
Reply #1 - Feb 7th, 2017 at 8:29pm
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Hi takbok, I'm running an L461 Sako with 23"Trueflite barrel 1:10
I'm mostly using 75gr Sierra HP bullets behind Hodgson H335. After reading a lot of info from US forums, this was a popular loading with good speed & knockdown on deer & goats, 3130fps. I have also tried 69gr GS Custom with good results on paper but not tried on animals, 3120fps. I can only load to 58.5mm OAL so have stuck with under 85gr bullets.
Keen to see your results with the 8 twist barrel.
  
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Re: What 6x45 loads are you guys using?
Reply #2 - Feb 7th, 2017 at 9:16pm
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Cheers for that, Mathias. I really like the GS Custom's - use them in my .270 and are very effective. I chose the 62gr as I thought the 69gr would be too long and I hope to get them up to around 3400fps.

The 8 twist barrel was one that was sitting on a gunsmiths shelf for a long time so got it cheap. I'm not likely to go over 85gr for hunting I don't think - will use the 62gr GS for Roe deer and jacketed bullets if I shoot any vermin. It will be interesting to see how it shoots the long 105gr bullets. The 95gr Sierra TMK might be an interesting one to try.

The US forums rate H335 quite highly. I will give that a try if Ramshot doesn't work.

The 6x45 seems like a fun round that I can shoot lots fairly cheaply, with a decent barrel life. Looking forward to it!
  
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Re: What 6x45 loads are you guys using?
Reply #3 - Feb 8th, 2017 at 1:05pm
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Yep cheap brass is a bonus for the 6x45. Generally you can have an increase of about 100- 150 fps over the same bullet weight in .224 (out of a 223), so you might struggle to get 3400fps with the 62gr and a 20.5" barrel. I went with the 6x45 to up the bullet weight without a longer OAL required with the .224 bullets, esp in a Sako Vixen action.
The 75gr Sierra is amazingly accurate through my set up and was the first load I tried.
  
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Re: What 6x45 loads are you guys using?
Reply #4 - Feb 9th, 2017 at 4:46am
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Yes, maybe being a bit optimistic. I'm getting fantastic velocity with 110gr GSC's in my 270 so am keen to see how much I can push them in the 6x45.

Just trying to be patient while a guy cerakotes my new stock before I send rifle to smith for rebarrel etc.
  
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Re: What 6x45 loads are you guys using?
Reply #5 - Feb 9th, 2017 at 10:51am
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Here's a thread I started a while back on the 6x45 with opinions and ideas.

it's got me seriously looking at the 25-45 sharps as an alternative.

Food for thought

http://www.fishnhunt.co.nz/forum/YaBB.cgi?num=1472040323
  

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Re: What 6x45 loads are you guys using?
Reply #6 - Feb 10th, 2017 at 8:19am
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Thanks, Seventenths. That was a good thread to read. I did think about the 25-45 but preferred the wider choice of 6mm bullets. I thought that the .277 Wolverine looked good but it requires extra steps to make brass and doesn't offer anything over the 6x45 unless you're shooting heavy bullets IMO.
  
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Re: What 6x45 loads are you guys using?
Reply #7 - Feb 28th, 2017 at 1:02am
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Here's the finished stock with 15" LOP. Just received it back from being cerakoted OD green. Weighs 1077g and is nice and stiff.

Hopefully get the rifle back from the smith in about 2 weeks.

https://www.thestalkingdirectory.co.uk/showthread.php/132104-Homemade-fibreglass...
  
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Re: What 6x45 loads are you guys using?
Reply #8 - Mar 3rd, 2017 at 4:20pm
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I have a cooper, M51 stainless excalibur 20" in  6x45, 1-10 twist, on order, hopefully be ready, soon, will bring to Nz to replace my  .222, Looking at 60gr for small game, and 70-80gr for smaller deer, goats etc.
Was hoping it would show up, for me to bring to NZ, but I fly in 20 days, six weeks off, am looking forward to sum, hunting and fishing.

Bought a cooper single shot, this winter, (smoking deal)  Coolin 6x47 Remington, was at the range last weekend and got it Dailed in with 60g Sierra hp, for varmints, and 75g Hp for bigger game, very accurate, I am impressed, Smiley 1/2" easy with 60hp, and 30g BLC-2. Going to try for a couple coyotes, this weekend. will take the 6x47 rem.

  
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Re: What 6x45 loads are you guys using?
Reply #9 - Apr 21st, 2017 at 11:47pm
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I've just got the rifle back.

I'll try some supersonic loads in a couple of weeks.

In the meantime I've sorted out a subsonic load with 3.8gr Vihtavuori N310 pistol powder under a 120gr powder coated cast bullet - great fun for shooting in the garden.
  
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Re: What 6x45 loads are you guys using?
Reply #10 - May 9th, 2017 at 5:36am
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Shot my first groups at 100m on Saturday. 105gr A-max seated to 2.36" OAL with 23.5gr Ramshot Xterminator and CCI450 primer. Getting around 2550 fps.

Grouped around 0.75". Will maybe try one or two tweaks to see if accuracy can be improved. Bullet is around 0.11" from the rifling.

I managed to get a roe buck soon afterwards so am pretty chuffed!
  
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Re: What 6x45 loads are you guys using?
Reply #11 - May 9th, 2017 at 7:59am
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takbok wrote on May 9th, 2017 at 5:36am:
Shot my first groups at 100m on Saturday. 105gr A-max seated to 2.36" OAL with 23.5gr Ramshot Xterminator and CCI450 primer. Getting around 2550 fps.

Grouped around 0.75". Will maybe try one or two tweaks to see if accuracy can be improved. Bullet is around 0.11" from the rifling.

I managed to get a roe buck soon afterwards so am pretty chuffed!


Good stuff  Cool Looking forward to more on this.
  
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Re: What 6x45 loads are you guys using?
Reply #12 - May 21st, 2017 at 11:07pm
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I tried shooting some 62gr GS Custom bullets (243062HV08) over the chronograph this week.

COAL 2.34", CCI450 primer, Norma brass.

Ramshot Xterminator powder:

28gr -    3120fps
28.5 - 3180
29-     error reading
29.5-  3244
30.0 - 3223
30.5 - 3271

Very compressed loads (case overflowing with last one) and I wasn't too impressed with the velocities.

The GS Custom website doesn't have load data for 6x45 so went on their 6mm TCU recommendations and bought some Reloder 7 (AR2207 was another recommended powder). Much faster powders than usual for the 6x45 but these bullets are not normal!

Reloder 7 powder results from yesterday morning:

23gr - 2987fps
23.5 - 3051
24 -    3145
24.5 - 3226
25 -    3250
25.5 - 3356
26 -    3431

I'm pretty happy now. Will try a couple of higher charges to confirm max load then shoot some groups.
  
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Re: What 6x45 loads are you guys using?
Reply #13 - May 24th, 2017 at 7:42am
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Reached the limit with the GS Customs tonight.

26.4gr - 3476fps
26.7gr - 3522fps (blown primer).
  
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Re: What 6x45 loads are you guys using?
Reply #14 - May 24th, 2017 at 7:51am
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takbok wrote on May 24th, 2017 at 7:42am:
Reached the limit with the GS Customs tonight.

26.4gr - 3476fps
26.7gr - 3522fps (blown primer).


They are healthy velocities. You would be had pushed to get a 223 to equal that in a 60gr round. Shows how going up in bore size can produce the speed.
Be interested how RL7 goes with 75-80gr.
  
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