10mm boolit for the Glock 20

[hunter74]

Anyone with experience with cast boolits in Glock 20? I’ve recently purchased one and my intention is using it in competitive shooting with a power factor around 200. A heavy boolit is a good thing because it reaches the PF fast with less muzzle blast and less snappy recoil. Since I cast I’m of course looking for a god boolit for this use. Does anyone know if the G20 can take a heavier than 200 gr boolit? For my use I don’t need the extreme speeds. With a boolit around 180-200 grs or heavier I’m thinking about 1100-1200 fps. Any thoughts about this one http://www.accuratemolds.com/bullet_detail.php?bullet=40-200R-D.png ? For my application, would you use a gas check for the 10mm boolit?

Shared experience would be greatly treasured! Thanks!

[osteodoc08]

http://castboolits.gunloads.com/showthread.php?33855-The-Truth-about-Glocks-and-Cast

Lots of good info here.

There are several good boolits for the 10mm. Yes, even in the Glock. Look under the GB section.

[RED333]

I shoot this mold out of all our 40 cal Glocks, powder coat or tumble lube both work great.
Gas check, my molds do not have them so I do not have the answer.
I will tell ya we hit steel at 50 yrds with ours.
http://castboolits.gunloads.com/showthread.php?171093-Mihec-10mm-200gr-WFN-40s-amp-w-180gr-HP-4-cavity-Brass
Accurate makes good molds, you cant go wrong.

[seaboltm]

I have considered using 41 mag molds. I thought you could do a sizing on the lubrisizer to maybe 408. This would fill the lube grooves. Then use a Lee push through to get to maybe 401. It is two steps of resizing, but I don't know why it wouldnt work. The lube in the grooves should keep them from collapsing when going through the push through sizer, in theory.

[Lloyd Smale]

ballistic cast makes a 220 grain turnacute nosed mold that works good in mine. I dont know the number as it is my buddys mold.

[Oreo]

http://castboolits.gunloads.com/showthread.php?171093-Mihec-10mm-200gr-WFN-40s-amp-w-180gr-HP-4-cavity-Brass

This one has established a very good reputation. You could try sending a PM to MiHec asking if there are any left. I haven't heard of anyone being turned away yet.

[Jupiter7]

+1 for the Oreo designed mihec 200gr

[Oreo]

I am working on a 220gr version but the way these group buys go, that one is still at least a year out.

[Blanco]

I have the 170 Gr. version of the Oreo/ Mihec.
It is one of the nicest moulds I have ever seen or used and so far is also the most accurate I have shot in .40
If you can find the 190 Gr version I would buy it in a heartbeat.

[hunter74]

Is it brass or alu this Oreo/Mihec? I've never used brass and are afraid of varpage

[Blanco]

Mine is brass
I see no issue with warpage the mould is heavy and very stable.
Mine actually likes to run a bit on the hot side to make nice Penta Points.
HP moulds are one of the best I have ever used.

[Lloyd Smale]

you have more of a chance of warping an aluminum mold then a brass one. I warped a few lees. Never warped a brass mold. Id have to say that some of my best casting molds are my brass molds. Only disadvantage is there heavy. I keep them to 2 cav anymore as 4 cav brass molds can be a workout in a long session.

[harley45]

I am working on a 220gr version but the way these group buys go, that one is still at least a year out.

This at 1000 or so FPS will be a great woods boolit if we can get it to stabilize!

[mannyCA]

Lyman has the 401638 175gr with a nice fat lube groove, I've gotten them up to 1300fps without any problems in my glock. Good design.

[sleeper1428]

I've had my Glock 20 for going on 25 years and one of my standard cast boolits is a 200gr TCBB SAECO design, dropped from a mould that I picked up from LETS (Leading Edge Tool Service) just before Tom closed up shop. That particular mould is listed as #047 and it's probably still available from Redding who now handles SAECO boolit moulds. Unfortunately, while SAECO moulds are well made and drop excellent boolits, they are rather expensive - two cav running around $146 and four cav running about $245 - and they require the use of SAECO brand handles. But back when I bought this mould, as well as several others, SAECO was one of the best available, since mould producers such as MiHec, NOE, etc, etc, had yet to come on the market. Plus Tom gave me a heck of a good deal since he wanted to clear out his inventory before he closed up the LETS business. This particular boolit, the 200gr TCBB SAECO, along with its little brother, the #043 170gr TCBB SAECO, have been the standard fodder for my Glock 20 for many years and in actual fact, I don't recall shooting more than 50 rounds of commercial since I bought this handgun. With the advent of MiHec and NOE, my Glock 22 is now fed a diet of several different designs from these two great companies and even the Glock 20 gets some of them. But for a heavy boolit I still depend on that 200gr TCBB SAECO design, commonly driven by an appropriate charge of AA#7.

sleeper1428

[chucky64]

Check out the RCBS 2-Cavity Bullet Mold 10mm-200-SWC 40 S&W, 10mm (401 Diameter) 200 Grain Semi-Wadcutter. I has worked great for me in my G20, you wont have to wait for a custom mold
and can be casting as soon as it get to your door. Unfortantly, you will have to buy a set of handles
if you dont already own a RCBS mold. Midway has this mold on sale right now. http://www.midwayusa.com/product/224747/rcbs-2-cavity-bullet-mold-10mm-200-swc-40-s-and-w-10mm-401-diameter-200-grain-semi-wadcutter?cm_vc=ProductFinding#ReviewHeader

[oger]

I second the RCBS 200. It works real well in my 40s and Glock 10mm.

[harley45]

I used the RCBS before I got my MIHEC and it is a good choice if you don't want. To wait.

[hunter74]

To be honest I'm not intersted to put up so much money in a 2 cav mould when I can get a 4, 5 or 6 cav for less money from one of the custom mould makers. They also offers about the same designs as RCBS. Accurate moulds offer many designs but I've never tried a mould from him. I have 7 or 8 from NOE and I am impressed with the quality and customer service.

[hunter74]

I contacted Miha and ordered a 4 cav brass mould. The 170/150 gr with WFN or HP. Thank you all for good advice. I guess I have to read up on casting HPs. I have never tried that before. For competition I guess the WFN will be used. HP is not allowed at my indoor range

[hunter74]

One more thing..... I have not yet sluged the barrel in my G20. Measured some harcast I have and it seems to work great without leading. It measured. 4018. I've ordered. 401 an 402 dies from Lathesmith. Do you get 402 to chsmber in your Glocks? I guess the biggest that chambers is the way to go, and not the softest alloy. My magnum alloy is 50/50 range scrap/linotype. For all other use my alloy is about 70/30 range scrap/sheet lead (pure) +2% tin. I guess that would be a bit on the soft side for this use in about 1200 fps?

[Elkins45]

http://i292.photobucket.com/albums/mm35/elkins_pix/IMG_0599_zps67409f00.jpg (http://s292.photobucket.com/user/elkins_pix/media/IMG_0599_zps67409f00.jpg.html)

200 Grain from Mountain Molds seated long in a 40 S&W case. I tried to design it to leave as much of the length outside the case as possible so that I could get enough AA#9 inside a 10mm case to make 1200 fps. At this seating length I can shoot 40 S&W cases in the 10mm barrel and the bullet is seated out far enough to hold headspace on the chamber leade. I haven't done much experimenting with the 40 cases but it works well with 10mm brass.

[MattOrgan]

Don't overlook the Lee .40/10mm 180 gr truncated cone tumble lube mold. I've been using a six cavity Lee for many years for .40 and 10mm, the majority in Glock pistols. A bonus is that it turned out to work great in my .38-40 Model 92. I've had great luck with using 45/45/10 tumble lube for all cartridges up to 1400 fps in the .38-40. I do not size as the bullets measure a little over .401 as cast. There is NO leading in any barrel, the M92 stays bright. This using scrap from my bullet trap that is primarily .22 RF bullets and cast wheel weight bullets. I've done a little experimenting with powder coating and will do more when I cast my next batch of these bullets, but it's just to have colored bullets, not too improve performance.

[hunter74]

Today I used my brass mould from Miha. It was a joy to cast with and it looks like a work of art. The HP pins worked flawlessly even if it was my first experience with a brass mould and with the HP-pins. That penta point looks evil J The mould liked to run hot but I had to slow down the pace so it didn’t get to hot. Usually I run two alu moulds in tandem, especially with big boolits, but my first session with the brass mould I ran solo. I understand why they don’t make 6 cav brass moulds. In a long session 4 is enough!

If I may say so myself, it produced nice boolits.

116682

[fredj338]

Anyone with experience with cast boolits in Glock 20? I’ve recently purchased one and my intention is using it in competitive shooting with a power factor around 200. A heavy boolit is a good thing because it reaches the PF fast with less muzzle blast and less snappy recoil. Since I cast I’m of course looking for a god boolit for this use. Does anyone know if the G20 can take a heavier than 200 gr boolit? For my use I don’t need the extreme speeds. With a boolit around 180-200 grs or heavier I’m thinking about 1100-1200 fps. Any thoughts about this one http://www.accuratemolds.com/bullet_detail.php?bullet=40-200R-D.png ? For my application, would you use a gas check for the 10mm boolit?

Shared experience would be greatly treasured! Thanks!

What kind of competition? Yes, PF can be reached more easily with a heavier bullet, but at some point, you are getting more recoil than needed.
I have been playing with heavy 220gr bullets in my G20sf. It seems accuracy is good either below 1000fps or close to 1100fps, in between, ****. These are Xtrme 220gr plated, but would be sim length to most cast designs.

[hunter74]

After a long winter with almost no shooting I've started to play with my G20 loads again. I'm sad to say that I've had no luck to get my 170 WFN boolis to work in my factory G20 barrel without leading. So far I have used my 20 lbs pot with range scrap in it and added different amounts of linotype to try different hardness on my boolits with the same result. Leading throughout my barrel. So far I've tried with 2 lbs lino added and 4 lbs lino added to my pot + a little tin. I also water drop so the boolits with 4 lbs lino measures about 22 BHN after two weeks. The load last tried was 8.3 gr of Longshot powder and the boolits sized to .401.

A much milder load of 6 gr of Universal gets the same result. Lead streaks throughout the rifling. Before I give up CB's in the factory barrel I have not tried even harder boolits and size them to .402. That may work, or what do you think? Thats seems awful hard. Softer with .402 did not work. If this does not work should I change powder? I have VV N105 and Blue Dot in my possession. My goal is to get them up to about 1200 ft without leading. This is strange! I’ve had great luck shooting naked lead boolits in my other 9mm Glocks with the factory barrel. If it’s the high pressure in the 10mm that makes the leading, I can not understand why the “wimp loads” of 6 gr Universal leads!

I’m sure that the boolits are seated right and that they stay true to diameter after seating. I crimp in a separate operation on my 550 and the cases are enough belled before seating.

I use carnuba red and the lube works great in all other applications so I do not want to blame the lube either :)

Thanks, I’m sure some of you can give me a tip or two to try next. I’m tempted to buy a aftermarket long barrel for my Glock 20 but I would hate the reason to be that lead boolits don’t work in the factory barrel :grin:

[hunter74]

I have also tried with 6 lbs of lino added to my pot with the same poor result. I can't see why I should cast harder!

[hunter74]

My bad experiences with the factory barrel and lead boolits in the G20 made my buy an aftermarket barrel. To get max velocity out of the barrel I bought an IGB 10 inch barrel. I get about 100 fps more with my loads with this barrel compared to the factory barrel. The leading problems also dissappeared. The chamber is much tighter so I have to use the FCD to get alle my cases to chamber every time, still no leading! The days of worring about the ten are gone. Now I just have to load and shoot and that shows on my supply of Longshot!