Thread: 6x45 Rem barrel

A big jump don't matter, at least not in my 6.5TCU. Reamers are generally made to allow 140s to be seated right out. I think when I load 95gn projectiles the jump is something like 6mm and they still shoot very well

Originally Posted by mikee

A big jump don't matter, at least not in my 6.5TCU. Reamers are generally made to allow 140s to be seated right out. I think when I load 95gn projectiles the jump is something like 6mm and they still shoot very well

Lets hope not.. I will find out as soon as this wind and rain eases..
The first of JD Jones's reamers were made for the Thompson contender single shot pistols so mag length was not a consideration when the TCU reamers were designed.

Your assumption about the 75gr Sierra being a better OAL for your set up should be correct. On my 6x45 they have a touch lands as just over 59mm OAL. I found that any tipped bullet had to have a deep seat, even the 70gr Nosler BT but still attained very good accuracy as mikee states. Looking forward to seeing some results when the weather clears up for you

Originally Posted by Mathias

Your assumption about the 75gr Sierra being a better OAL for your set up should be correct. On my 6x45 they have a touch lands as just over 59mm OAL. I found that any tipped bullet had to have a deep seat, even the 70gr Nosler BT but still attained very good accuracy as mikee states. Looking forward to seeing some results when the weather clears up for you

That gives me a lot more confidence in jumping them for sure. I guess its not so much the jump that bothers me but the deep seating and compressed loads. However I learned a lot about the seating depths of a few more bullets Id intended on testing today.

It was great to catch up with @southernman today who was generous enough to loan me his Redding 6x45 die set (among other goodies for my .17 Mach IV and .20 Vartarg builds) for a few months until mine turn up.

He was also good enough to bring his 6x45 Cooper S/S rifle (lovely bit of kit!) and ammo with him which I go to measure up against my chamber.
He had loaded 70gr Nosler BT, 65gr V-Max, 85gr Sierra Gamekings and 75gr Sierra Varminters all loaded between 60.00 and 61.0mm COAL apart from the 75gr Varminter which was about 59mm and fitted my mag.
All dropped into my chamber without contacting the lands even though they were longer than my mag length apart from the 75gr Varminter once again that entered the lands.
Once again I appreciate southernman's generosity and help as he let me pull one of his 75gr Sierra HP loads to set up in my chamber.
It turns out this proectile is about as perfect as it gets for my chamber, it kissed the lands at 58.83mm so will grab a box and load some test rounds at 58.80mm (about .8mm clearance in my mag) to put on paper too.

Always cool to meet like minded people with the same interests, so thanks again for stopping in and sharing your Redding and Lapua goodies mate. Theres always a coffee and a test range here for you whenever you are travelling past.

awesome man theres some good bastards on here 😎

Nice to meet up with @Wingman this afternoon, have loaned a few dies, to help his projects along. thanks for the coffee, had a look at sum of his toys, His lathe, I am quite jealous off, I think it would be fine in my shed.
drop us a pm, if you after any bits and pieces from Canada.

Originally Posted by quadhunter260

awesome man theres some good bastards on here ��

jeez tell me about it

Well the rain stopped but the wind continues but I decided to shoot the 10 rounds I had loaded anyway.
I figured that now I have the correct dies they will make better ammo than the makeshift ones I sized and seated with some 6mmPPC dies.. so I used this ammo to zero the scope and fire form the brass.

It took 2 rounds of the 70gr Nosler to zero it then the other 3 clover leafed nicely into just under a 1/2 inch at 100m.



The 70gr Sierra Blitzkings didnt go quite as well but still under an inch.



Im sure both these bullets would shoot great with some tuning of the load but they are both light jacketed varmint bullets which is not what I was wanting for this cartridge anyway. I have ordered some 75gr Sierra HPs and will spend my load development time with them.

The Sierra 75gr HPs turned up today and they really are spot on for my throat and mag length. They seat perfectly with 100% neck contact and dont take up valuable powder space in the shoulder.
Ive loaded both H4895 and BM-8208 with 26.5gr which is .5gr off the max load on both powders.
The H4898 was full to about half the neck and a lightly compressed load. The BM8208 was just below the neck junction so still had some rattle to it.
Will test them as soon as this xmas crap is out of the way.

With some perfect still conditions for load testing of the 75gr HPs today I jumped at the chance.

I fitted the 6x45 barrel to the cz and loaded the five H4895 rounds into the mag.

I messed up here as I forgot that I gave the barrel a scrub clean after the last test so the first shot was 40fps fast and high.
I should have loaded some fouling shots first but meh.. take it for what it is.
Other than that first shot it was a very small group.

The chrono readings were as follows:

3002, 2969, 2960, 2960, 2961 fps



The BM8208 were the next group and they also shot pretty well with a bit more velocity but also slightly flatter primers.

The string was looking good except the second to last shot. Not sure what went on there.

2985, 2982, 2981, 3000, 2986 fps




I could back the BM8208 load off .5gr to match the H4895 velocities to see If the pressure drops back a bit too but I think Ill just run with the H4895.
Just as @Mathias mentioned in an earlier post you can see the BM8208 primers a quite a bit flatter showing higher case pressures than the H4895 on the left.

Good stuff.
As mentioned, I found the same result when using 8208. My H335 load of 27.3gr has the same primers as your 4895 and 27gr 8208 has very flat primers, both for very similar velocity of 3045-3050fps.
Accuracy is much the same as yours...if I'm doing my bit. No need for a fancy tipped boat tail bullet for out to 300m, these 75gr Sierra's are it for the 6x45.

Originally Posted by Mathias

Good stuff.
I found the same result when using 8208. My H335 load of 27.3gr has the same primers as your 4895 and 27gr 8208 has very flat primers, both for very similar velocity of 3045-3050fps.
Accuracy is much the same as yours...if I'm doing my bit. No need for a fancy tipped boat tail bullet for out to 300m, these 75gr Sierra's are it for the 6x45.

Yes Sir, Im pretty happy with those results.
For a sweet shooting fluted s/s barrel Id say $99 dollars was a win for this build.

What barrel length are you running? how full is your case with 27.3gr of H335? (not a powder Ive ever used)

Originally Posted by Wingman

Yes sir, Im pretty happy with those results. For a sweet shooting fluted s/s barrel Id say $99 dollars was a win for this build.

What barrel length are you running? how full is your case with 27.3gr of H335? (not a powder Ive ever used)

Great value for money.
23" plus a suppressor. Powder is about mid shoulder, so no compression. I picked up a lot of info from US websites on the 6x45 and H335 featured a lot as powder of choice for up to 75-80gr. Its a dirty ball powder but it gives good velocity and accuracy, with a BR4 primer.

Funny how some threads are motivating. Just finished prepping 300 6x45 cases

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