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Long time since I checked this thread, sorry for late reply.

1900fps is how fast I am pushing my beer can gas checked 155gn bullets now, I won´t go any hotter since they group fine and I will...

Ah, nice. It is a bit of an inconvenience to fit the GC when seating the bullet but I can live with it since I dont shoot 1000++ rifle rounds every year.

That is the downside with Reload Swiss powder, very little load data to be found.

How do you keep the bullet tip from deforming?

Couldn´t it be so that a flimsy gas check like this one would negatively affect accuracy if it was glued to the base but starting to break away at the edges? Better if it drops off directly after the...

Here is a pic of the punch and a bunch of finished gas checks. No idea why the images end up sideways in the post.

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I dont think I've ever seen one of those in store here in Sweden.

I upped the powder charge to 18.0gn RS36 and got chrono readings of aprox. 1800fps. Got a 2" group at 20m shooting standing without support which is about what I can manage with a red dot so no blame...

Since I modified the mold I can´t use any thicker gas checks than this, I could from the start have ordered a sheet of suitable thickness but then the whole idea of being able to make the bullets all...

Since I have an endless supply of empty beer cans in my workshop I wanted to try and use them for my 300 Blackout loads, a Lee 155gn PCed bullet for plinkling up to 200meters.

I made myself a gas...

The thing is that here in Sweden the upper is what needs a license, not the lower like in the States. So changing a barrel twist, caliber or length is a pretty involved process with club certificates...

Back from a morning at the 300meter range, a friend and I did some testing to figure out the trajectory of some loads.

I have made a batch of 155gn loads with 17.0gn RS36 powder under them, clocks...

They got that much harder from a month of storage despite being water dropped?

I did a fair bit of internet research when I first started casting bullets but the fact that age hardening is...

That was very kind of you sir. :)

While being in the chitchat mode about bullet hardness, is there a recommended length of time a cast bullet should "rest" before being shot so it has time to age...

Ah, my bad. I shouldnt have slept through chemistry class.

Ha, that must have made quite a water spray. :)

Sub-2000fps seems from all the posts in the thread as the way to go with this bullet.



So you was shooting pure lead mixed with 4% tin? No...

Another question, what lead hardness do you run in your 300blk supersonics?

I´ve been casting a fair amount of bullets for 9mm and 38spl, and found that a 50/50 mix of WW and pure lead, water...

That sounds logical, thanks for the input.

I don't know if Major factor is calculated differently in IPSC than in other shooting sports, but in IPSC it is bullet weight x speed /1000. A 200gn...

So you don´t size the bullets after coating? I´ve heard that using the ESPC method standing on the base without gas checks can cause leading and fouling of the compensator, have you noticed any?

...

My main division is Open handgun where I was going to represent the Sweden National team at World Shoot in Thailand this winter, if it wasn´t for the Corona lockdown.

Rifle shooting is more on...

Good point about the rpm's, I'll try to find the sweet spot where they still shoot fine and go fast enough to have a reasonably flat trajectory out to 200m or so.

I have aprox. 300kg of wheel...

I dont think that 223 is a caliber suited for Major power factor, to reach a PF of 320 you would need to push a 55gn bullet up to 5800fps.....

Thanks for your answers, I understand that I will be stretching the limits with a 2000+fps load from the 155gn bullet and 1:7 twist. Perhaps it would be wisest to settle for making an accurate...

Hi fellow casters!

I am building a 16" AR-15 in 300blk (1:7 twist rate) and plan to compete in IPSC with it, and I will need to push a powder coated 155gn Lee gas checked bullet to 2100fps to...