New Swiss K31 and reusing GP11 cases

[lencac]

Something I may have not mentioned and I haven't read through the entire posting again. When I use the Hornady comparator tool it will of itself add 1" to the overall measurement.
So my actual bullet seating depth as measured from the base to the ogive is 2.250". This is the spec. I now use for any bullets I load. This will allow adequate clearance to the barrel lands on any K31. Remember BASE to OGIVE ............ not base to tip
And so because it is being measured at the ogive and not the tip it won't make any appreciable difference between bullet types or shapes. No matter whether Berger VLD's or Hornady 150 FMJ'S or any other for that matter.
But using the tool and various types of bullets the measurement may vary by .010" maybe but no enough to make any real difference. Just make sure you leave about .025+" clearance to the lands and any bullet will be fine.
Don't worry about using 4831 powder. It's too slow. I've found out basically the same result as you. 4831 is not suitable for K31's Use a powder in the IMR 4064 range. It provids excellent velocity and accuracy. I've also found AR-Comp powder to be very good too. IMR 4064 w/44.0 gr. and AR-Comp 43.0 gr.

 

[masood]

Something I may have not mentioned and I haven't read through the entire posting again. When I use the Hornady comparator tool it will of itself add 1" to the overall measurement.
So my actual bullet seating depth as measured from the base to the ogive is 2.250". This is the spec. I now use for any bullets I load. This will allow adequate clearance to the barrel lands on any K31. Remember BASE to OGIVE ............ not base to tip
And so because it is being measured at the ogive and not the tip it won't make any appreciable difference between bullet types or shapes. No matter whether Berger VLD's or Hornady 150 FMJ'S or any other for that matter.
But using the tool and various types of bullets the measurement may vary by .010" maybe but no enough to make any real difference. Just make sure you leave about .025+" clearance to the lands and any bullet will be fine.
Don't worry about using 4831 powder. It's too slow. I've found out basically the same result as you. 4831 is not suitable for K31's Use a powder in the IMR 4064 range. It provids excellent velocity and accuracy. I've also found AR-Comp powder to be very good too. IMR 4064 w/44.0 gr. and AR-Comp 43.0 gr.

THanks Lencac for your reply and recommendation. I do have IMR 4064 and will load a mag or two to see how it will improve my experience with K31 (accuracy and speed). Yes, i noticed some built up in the vase using H4381SC, not much tho but still.

I will post result of new loads using IMR 4064 when I test them out shoot and chorno.

Regards,

Masood

 

[masood]

Also, how can I find a Hornady comparator or other brands for Swiss 7.5x55?

 

[masood]

what other powders are in the IMR 4064 range? I do have IMR 4046 as I mentioned my my earlier comment which I am loading now. just a mag. 6 rounds. I also have Win 760, Norma URP, RL22. I had very bad experience with H-380.

 

[lencac]

http://www.midwayusa.com/product/570611/hornady-lock-n-load-overall-length-gage-bolt-action

http://www.midwayusa.com/product/23...ad-bullet-comparator-basic-set-with-6-inserts

http://www.accuratepowder.com/wp-content/uploads/2010/12/burn_rates.pdf

http://www.hodgdon.com/PDF/Burn Rates - 2015-2016.pdf

And Hornady does not make a comparator 7.5x55 Swiss case. So you are going to have to make one.
Use a fired (unsized) 7.5x55 casing for boxer primer. Make sure the bullet will be able to slide in and out of the neck of the case with a little bit of resistance. You'll need a M8x0.75 tap and a 7.25mm (.284") drill bit. Drill the end of that casing out with 7.25mm (.284") drill and then tap it to the M8x0.75 thread pitch.

 

[alientrainwreck]

I just traded a really nice k31 1941 tripped tags under but plate walnut stock in probably 98% condition same with the barrel one of the nicest I've ever seen a tack driver also but I rarely ever shot it , so my wife decides that she wants this ar at the gun store and the Hillary scare was going on so I went home and got the gun and 5 bricks of the gp11 ammo I had and $150 to trade for her cmmg ar-15 tricked out with a Gisele trigger and keymod stocks ,surefire break and 10 pmags all brand new anyhow she loves her new gun and she shots alot now but after this election I wish that I had the k31 back. If I could only see into the future. Still was a good trade I think.

 

[lencac]

mmmmmm ..................... AR's are like a Ford Taurus . everybody has one. But not everybody has a Swiss built tack drivin K31. No comparison. I'll bet you wish you had the K31 back.
Do you know what a Private Series K31 is?

 

[alientrainwreck]

Ya, I now the gun dealer very well and he has it in his collection and I'll get it back but it's gonna cost me but it was my wife's gun in her name so she had her mind made up. I WILL GET IT BACK. me and this guy have been trading for years and he is a dear friend.

 

[Steel Horse Rider]

Lencac: The secret in the K31 to me is the bolt, which is simple in operation but not design. I have 3 of them and as yet have not reloaded any of the GP11 brass but I am saving it for retirement.....

Swampman: You have to count your shipping and hazmat fees in your costs unless you have some way of avoiding them.

 

[Swampman]

what other powders are in the IMR 4064 range? I do have IMR 4046 as I mentioned my my earlier comment which I am loading now. just a mag. 6 rounds. I also have Win 760, Norma URP, RL22. I had very bad experience with H-380.

With 168 grain and heavier bullets you're going to get higher velocities using powders that are slower than 4064. Despite what has been posted about 4831 being unsuitable for 7.5x55, if you look at the Hodgdon data site, you'll see that H4831 actually shows the highest velocity of all the powders they list for 168 grain bullets.
http://www.hodgdonreloading.com/data/rifle
I've used IMR-4064 for 150 grain loads and it gives very good accuracy, but IMR-4350 will give higher velocities.

IMR-4350 used to be my favorite 7.5 Swiss powder but I now prefer Reloder 17, it gives higher velocities and better accuracy than any powder I've used with 168 and 175 grain bullets.

Swampman: You have to count your shipping and hazmat fees in your costs unless you have some way of avoiding them.

I thought I covered that in my original post when I said "not counting shipping or hazmat".

At current prices my 200 yard cast bullet loads break down like this:
Bullets = $1.30/100 (for gas checks, I get my lead for free)
Primers = $3.30/100 (not counting shipping or hazmat)
Powder = $4.15/100 (not counting shipping or hazmat)

Hazmat and shipping fees are going to be different for everyone depending on where and how much they order.

I wasn't giving my actual costs (other than for lead). When I said "at current prices" I was quoting Powder Valley and Gator Gas Check prices as they were listed at that time. Hazmat is the same whether you order 100 primers or 50,000. Same with powder, you pay the same hazmat for one pound as you do for 48 pounds.

Without knowing how much someone might order at one time, how could I possibly be expected to estimate shipping and hazmat costs?

As I said, I've had some of my components for decades, I have no idea what the actual hazmat and shipping cost per 100 primers or pound of powder was at the time they were ordered. I usually order at least 24 pounds of powder and 10,000 primers at a time to save on shipping and hazmat. I may order 3 different powders and 5 different types of primers at one time.

I don't sit down with a calculator and figure out how much hazmat I paid for each 100 primers and each pound of powder. I'd rather spend my time shooting or reloading.