Patmarlins Specialty Products for Casting and Reloading

Checkmaker Dies in 45 Caliber

LEE Press with a ROCKDock Mount

Precision Manufacturer for- Checkmaker™ Gas Check Forming Tool and Die sets

ROCKDock™ Reloading Bench Docking Mount System



ROCKDock™ Prices and Order Information


Send Email Order Request

Customer Testimonials

Featured shooters


ROCKDock™ -Reloading Bench Docking Mount System

Dillon XL550B




"The mailman brought my press docking mount from our very own Pat Marlin. As I expected, it is beautiful! This is a great setup, and for those of us whose benches must serve multiple purposes it is a wonderful addition. I had the docking mount installed in less than half an hour, and my Star and Lee presses bolted to their plates soon after. I shimmed it a bit, like the instructions say to do, and had it working to my liking in no time. I added a rail in front of my bench for my Akrobins, for that added bit of functionality. I highly recommend this setup! Thanks Pat,this thing is great!"

-Chris Smith

Outstanding product, overbuilt. Good communication!

-Tom Earley

Excellent,very good job...

-Richard Ivanich

If you're like me you have limited reloading bench space, and now I find I need to move my presses more frequently... from loading bench to the shop, from the bench to the range, or to a portable bench in front of the TV.

Then sometimes I need to easily swap bench positions of my presses and lube sizers for various tasks. Add the fact that I use 3 lube sizers each holding my favorite lubes, 4 presses and growing- bolting and unbolting is a pain.

I wanted to create a real strong- design that looked good on the bench and served other functions. Selling 8 years now, this heavy duty docking mount system has exceeded expectations in every way and proved to be rock solid and a joy to use.



ROCKDock™ orders now shipping within in 3 business days...!!


the Dillon 550B ROCKDock™!



ROCKDock™ your Powder Measures


"Everything including the Saeco fits like a glove!!! THANK YOU SO VERY MUCH FOR YOUR HARD WORK!

You have fixed a problem I have had with mounting these presses for the last 25-30 or so years. I am like a kid with a new toy! Take care and god bless....."

-Buck Able




Patmarlins™ Machined ROCKDock™ reloading bench Docking Mount System comes complete with (grade 8) bolts and instructions.


The ROCKDock™ Docking Mount- holds your gear down solid and spreads the foot print of your press base on your bench, spreading the load over the bench instead of stressing just the leading edge. Presses slide in and out solid without having to use a tool to tighten down.

Base plates- Predrilled with grade 8 bolts for your model reloading press, lube sizer, case prep tools, vises etc.


-Prices are subject to change due to metals increases-




ROCKdock your Vise for your AR-15

ROCKdock your Wheeler Vise for your AR-15

ROCKDock your AR-15 tools...!



-To Order-

-Email your name, address and order wishes/questions and I will email back an order confirmation with payment instructions-


MAKE SURE West Coast Engineering is NOT in your email trash bin. Many times folks never realize I have emailed them back and my email gets blocked.


We accept Check, Money Orders, and PayPal payments.

Pat -

West Coast Engineering


Turn your Dillon Strong Mount into a multi purpose platform...!



Lube Heater Plate-

(Cross Back Plate Option) The lube heater plate works EXTREMELY well. It transfers heat to your lube so efficiently, you only need run your iron at a very low setting to dial in just the right temperature for your boolit lube. Lube heater uses clothes iron shelf on top to heat your lube sizer- warming your favorite lube.


All machined parts out of 6061 T6 aircraft aluminum complete with instructions all mounting hardware. Makes for a rock solid mounting and is guaranteed to have a no slop snug fit from press to press and bench to bench. A lot of work and craftsmanship goes into making this quality product made here in the USA.




Checkmaker™ Gas Check Forming Tool and Die Sets

Find out about and see how our... Checkmaker Gas Check Forming Tools work including examples and customer accuracy results.


Checkmaker™ dies are very different from factory and FreeChex. The heavy duty- (reloading press) design without the shortcomings of springs has proven reliable in making accurate shooting gas checks for over 6 years now.


Checkmaker™ Gas Check Forming Die Sets:


-Meet or exceed accuracy shooting results of factory gas checks.

-Very user friendly- fast and easy to use, and to set up.

-Produce a bare minimum of material waste.

-Produce concentric gas checks that fit and STAY on, using the accuracy of your reloading press.

-Heavy duty machined quality with no moving parts to break or gum up.

-Flexible- accommodate a wide range of material thickness- and work with a wide range of Boolit diameters all within one caliber set.

-Lifetime purchase and user re-sharpen able-



I fully guarantee EVERY die set to be spot on and work flawlessly to your satisfaction, with a "No BS" warranty.

-Heavy duty designed quality machined-








"The proof is in the accuracy results"


For cast shooters- accuracy is the quest we all seek with our beloved silver stream.

Why invest in a gaget that claims to make a pile of checks in record speed, when Checkmaker™ dies produce excellence at only a slightly slower pace.

I want a die that produces results that shoot, not just sit there and look pretty.


.... B. R. James

The 1# choice...

Checkmaker™ gas check making dies are guaranteed to perform flawlessly as currently proven by numerous cast shooters:




All calibers will be offered in a "PB" plain base version (shown) as well so you can push your favorite plain base mold boolits to places like never before. PB caliber in production NOW!


I tried the 35 plain base checks in my brothers 9mm thats been giving us fits. I tried a load that put quite a bit of lead in the barrel according to my notes. I put the checks on the boolits this time and guess what???

No more leading and very accurate in his pistol and carbine. These PB checks make 9mm loads very easy now. No more problems. Right there made this tool worth the money. Awesome results!

- Ken Dodge


"If I were starting over in pistol molds I would get only plain base molds. The plain base gas check makes the plain base boolit dual purpose. Only have to cast one boolit for either application."

-Robert Freestone



Here's an official PDF download link for Checkmaker™ die instructions:



-We are now fully automated CNC and are running various calibers-



Thank you for your Kindness, business, and support of a Home Grown =American Manufacturer.

MADE in the USA!

Pat -

West Coast Engineering


Pat says the following :

"These Checkmaker™ dies are fast and easy to set up, fast and easy to use, and produce accurate, concentric, gas checks with the help and accuracy of your reloading press and leave an extremely small amount of material waste."

He is ' dead on ' with his comments. This is a quality product and will work just as he describes. The ones I made this afternoon ( made from .010 CU ) were tried on 3 different .30 cal cast bullet designs. They fit tight on all 3.

Great Product Pat ! ! ! ....Well Done !

-Ben Hays

Hays Gunstock Refinishing and Repair


Currently we are taking Checkmaker™ orders and running various calibers including our "PB" caliber (PB- for "plain base" molds) gas check dies first come, first serve. CNC is NOW online!




-Prices are subject to change due to metals increases-


-All defects of any parts or dies out of spec will be replaced pronto, without time limit-



Satisfaction or your money back...! You are investing in quality here. All of my products come with a "No BS" warrantee. My aim is to make you happy with your purchase.

Kindest regards,



Just a small sample of our customer feedback...


.30 cal tool used at last...


Pat I just had to let you know that the shoulder problems are almost gone (Jerry tore his rotator cuff) and I produced a pile of great looking checks today. The tool does exactly what you said and I'm in hog heaven.


Thanks for all your efforts.


Jerry B.


mold maker


Simplicity and elegance

It went together like butter on hot toast and is a really nice simple



I may have to order more and I am sure once buddies see it they will

want one to clean up their tabletop.


Thanks for a great product.


Gary Banas


Everything including the saeco , fits like a glove!!!


You have fixed a problim I have had with mounting these presses for the last 25-30 or so years.

I am like a kid with a new toy! Take care and god bless.....Buck


First of all, Pat. Quality and very easy to use!!

Ernie Plumber

This seems to be one d*mn slick little tool. I had a very short learning curve, as you would with any tool. I'm sure I'll continue to refine as I experiment. I have a small pile of soda can gaschecks forming.

Patrick L.

Had a box waiting for me when I arrived home this evening. First bit of advice I can offer - retreat to your man cave before you open the box. Failure to heed this warning will cause you to be reintroduced to the Hoover. This will make sense when you open the box.


The tool is a very clever design and just takes a few minutes to become acquainted with the various parts and how they fit together. I had two materials I had put aside to try, mainly because they were free. I have some .008 soft copper and some .012 aluminum roof flashing. Both materials formed good checks. The copper was easier to work with because it cut and formed easier. Checks formed from both materials seated perfectly on the shanks of 30 cal boolits I have laying around. I did not try any through the sizer yet, but will soon.


The tool works as advertised, and looks to be an interesting gadget to experiment with. Nice job, Pat!


Hi Pat, I finally got a chance to get down to the shop and try the new punch you sent.


Not tight, not loose, perfect! Thanks for all the help. Oh, and thanks for the extra CFF in the box. With all this flux, I need to find another motherload of wheelweights. Now I need to get what I loaded down to the range and see how they fly !


Thanks again Ernie (aka Plumber)

I have been pleased with the results using these checks. Todays results - same gun and load as before. 1" ~ 7/8" ~ 1" Not quite one hole, but better than I was doing with factory checks.

Robert F.


 Received the mount and plate today!  What can I say but that they are beautiful.

Trevor Green

Thank you pat, I received everything today, and have put it together.

I wish I'd of had one of these a long time ago.

It's very well made and strong.

Thanks again, Keith Marshall


Satisfaction or your money back...! You are investing in quality here. All of my products come with a "No BS" warrantee. My aim is to make you happy with your purchase.

Kindest regards,




-This website is under construction and will include all of our products and information soon.-


Made in the USA!