Freedom To Boom Deals Extended!
12% Off Almost Everything w/ Code: FREEDOM12 Or Free Shipping On $99+ w/ Code: 99FREESHIP

Freedom To Boom Savings Extended!
12% Off Almost Everything w/ Code: FREEDOM12 or Free Shipping On $99+ w/ Code: 99FREESHIP

Daily Deal: Clever Club Load 12Ga 2-3/4" 1oz #7.5 1250 FPS $9.79 $7.99 - Get Yours!

STAINLESS STEEL EXPANDER MANDRELS
Stainless Steel Expander Mandrel, 17 Caliber (.171")
Stainless Steel Expander Mandrel, 338 Caliber (.337")
Stainless Steel Expander Mandrel, 25 Caliber (.256")
Stainless Steel Expander Mandrel, 20 Caliber (.203")
Stainless Steel Expander Mandrel, 270 Caliber (.276")
Stainless Steel Expander Mandrel, 7mm (.283")
Stainless Steel Expander Mandrel, 6.5mm (.263")
Stainless Steel Expander Mandrel, 6mm (.242")
Stainless Steel Expander Mandrel, 30 Caliber (.307")
Stainless Steel Expander Mandrel, 22 Caliber (.223")
Stainless Steel Expander Mandrel, 8mm (.322")
STAINLESS STEEL EXPANDER MANDRELS
Stainless Steel Expander Mandrel, 17 Caliber (.171")
Stainless Steel Expander Mandrel, 338 Caliber (.337")
Stainless Steel Expander Mandrel, 25 Caliber (.256")
Stainless Steel Expander Mandrel, 20 Caliber (.203")
Stainless Steel Expander Mandrel, 270 Caliber (.276")
Stainless Steel Expander Mandrel, 7mm (.283")
Stainless Steel Expander Mandrel, 6.5mm (.263")
Stainless Steel Expander Mandrel, 6mm (.242")
Stainless Steel Expander Mandrel, 30 Caliber (.307")
Stainless Steel Expander Mandrel, 22 Caliber (.223")
Stainless Steel Expander Mandrel, 8mm (.322")
None
MadeInUsa MadeInUsa OFF

SINCLAIR INTERNATIONAL - Stainless Steel Expander Mandrel, 8mm (.322")

31 Reviews
Caliber
Stainless Steel Expander Mandrel, 8mm (.322")
Brownells #
749011523
MFR #
SINCLAIR EXPANDER MANDREL 8MM
UPC
$14.99
Coupon Code
Purchase Limit Help

Out of Stock

NOTIFY ME WHEN IT'S BACK IN STOCK
Can we ship this to you? (US only)
{{restriction.odmShipCheckMessage}}

How To Buy Guns Online

International purchase information

Specifications
Caliber:
32 Caliber
Diameter (in):
0.3220
Restriction
Can we ship this to you? (US only)
{{restriction.odmShipCheckMessage}}

How To Buy Guns Online

International purchase information

What is the SINCLAIR INTERNATIONAL - Stainless Steel Expander Mandrel, 8mm (.322")?
SINCLAIR STAINLESS STEEL EXPANDER MANDRELS

Our neck turning tool mandrels are made from high grade stainless steel on Precision turning centers. The shape, finish, and size are the result of years of use and experimentation by many hand loaders. All of our mandrels fit both our NT-3000 and NT-1000 neck turning tools and most of our older model neck turning tools. Our neck turning tool mandrels measure approximately about .002'' less than the bullet diameter for the caliber. Our expander mandrels are made .001'' larger than the turning mandrels. Using an expander mandrel prior to neck turning sizes the case to fit the neck turning mandrels perfectly. This correct fit makes the turning process more precise and much easier. Any of the mandrels can be used to ''neck'' cases up to the next caliber when used with the NT-EXP (Expander Body).
Available options
Image Description
Stainless Steel Expander Mandrel, 17 Caliber (.171") | SKU: 749001145
Stainless Steel Expander Mandrel, 17 Caliber (.171")
Brownells #: 749001145
Stainless Steel Expander Mandrel, 338 Caliber (.337") | SKU: 749001158
Stainless Steel Expander Mandrel, 338 Caliber (.337")
Brownells #: 749001158
Stainless Steel Expander Mandrel, 25 Caliber (.256") | SKU: 749001161
Stainless Steel Expander Mandrel, 25 Caliber (.256")
Brownells #: 749001161
Stainless Steel Expander Mandrel, 20 Caliber (.203") | SKU: 749001164
Stainless Steel Expander Mandrel, 20 Caliber (.203")
Brownells #: 749001164
Stainless Steel Expander Mandrel, 270 Caliber (.276") | SKU: 749001165
Stainless Steel Expander Mandrel, 270 Caliber (.276")
Brownells #: 749001165
Stainless Steel Expander Mandrel, 7mm (.283") | SKU: 749001176
Stainless Steel Expander Mandrel, 7mm (.283")
Brownells #: 749001176
Stainless Steel Expander Mandrel, 6.5mm (.263") | SKU: 749001179
Stainless Steel Expander Mandrel, 6.5mm (.263")
Brownells #: 749001179
Stainless Steel Expander Mandrel, 6mm (.242") | SKU: 749001182
Stainless Steel Expander Mandrel, 6mm (.242")
Brownells #: 749001182
Stainless Steel Expander Mandrel, 30 Caliber (.307") | SKU: 749001183
Stainless Steel Expander Mandrel, 30 Caliber (.307")
Brownells #: 749001183
Stainless Steel Expander Mandrel, 22 Caliber (.223") | SKU: 749001187
Stainless Steel Expander Mandrel, 22 Caliber (.223")
Brownells #: 749001187
Stainless Steel Expander Mandrel, 8mm (.322") | SKU: 749011523
Stainless Steel Expander Mandrel, 8mm (.322")
Brownells #: 749011523
Please select a FFL Dealer
or
7 dealers near
Distance:
10miles
arrow-down
Sort by:
Nearest first
arrow-down
pin wrong
No dealers found

Please search by another zipcode to find the nearest dealer.

Close
Brownells Retail Store
Phone Call
Pin in
Clock
You must select required check box

Note:

Listed hours & fees are not guaranteed and subject to change. Please contact the dealer to confirm current hours & fees.
* Must accept required fields.
  • Pin in Brownells Featured Dealers

    Choosing a Brownells Featured Dealer is the fastest and easiest way to complete your purchase. Brownells Featured Dealers have agreed to perform FFL transfers on guns purchased online from Brownells. We have their necessary FFL information on file and your FFL order will ship directly to them once processed.

  • Pin in Standard Dealers

    Standard Dealers have not yet agreed to perform FFL transfers on guns purchased online from Brownells. If you choose a Standard Dealer, you are responsible for contacting that dealer and arranging for the dealer to submit a signed copy of an FFL and to give Brownells permission to ship the gun.

  • Pin in Not Available Dealers

    Not Available Dealers are dealers Brownells cannot ship guns to at this time. These dealers either do not meet our requirements for FFL transfers, or prefer to not perform transfers for guns purchased online from Brownells.

Switch view map
7 dealers near

Alternative products

Left Badge
Right Badge OFF  
5 Stars

200

300

Add on

Left Badge
Right Badge OFF  
5 Stars

200

300

STAINLESS STEEL EXPANDER MANDRELS REVIEWS

4.3
31 Reviews
5 Stars
74%
4 Stars
6%
3 Stars
3%
2 Stars
3%
1 Stars
13%
Reviews Summary
Overall, users appreciate the performance of the stainless steel expander mandrels, noting their effectiveness in resizing and improving cartridge uniformity. However, some customers have experienced issues with durability and shipping delays, which slightly marred their experience. Despite this, the majority are satisfied and recommend these tools for reloading.
What Reviewers Are Saying
Product Performance
71%
Many reviewers highlight the effectiveness of the expander mandrels in providing consistent sizing and improving bullet alignment. Users report a noticeable enhancement in the performance of their reloading processes, with several stating it significantly reduced case issues like neck crush or deviation.
Durability and Material Quality
26%
A concern among some users relates to the durability of the mandrels, with mentions of the material being too soft. Reviewers have noted issues such as scoring and the mandrels accumulating brass material, leading to concerns about potential damage to high-quality brass cases.
Shipping and Availability
23%
A number of reviewers expressed frustration with shipping issues, citing slow delivery times and problems with product availability. While many received their products timely, a few faced delays that impacted their reloading schedules.
5
Expander mandrel
Adding the 6.5 caliber expander to my reloading bench. Have used these mandrels for years. Take the expander out of my full length dies and use the Sinclair expanders for almost perfect concentricity.
Would you recommend this? Yes, I would recommend to a friend
by KENDAL GRECIAN on May 12, 2026
Verified Purchase
Was this review helpful? 0
5
Great for expanding the neck size in thousand
I've been using a mandrel for many years now also in conjunction with a bushing Redding dies and found them to be excellent product
Would you recommend this? Yes, I would recommend to a friend
by Dennis on February 22, 2026
Was this review helpful? 0
5
Need 450 bushmaster and 458 socom sized dies
Need 450 bushmaster and 458 socom sized mandrels. Make it happen please. Lyman M dies are okay but I think these would work better
Would you recommend this? Yes, I would recommend to a friend
by Lynn Watson on February 10, 2026
Verified Purchase
Was this review helpful? 0
5
good mandrel.
Polish it up and use lube for smooth operation. Shipping was s….l….o…..w.
by Jeff Robinson on January 18, 2026
Verified Purchase
Was this review helpful? 0
5
Reloading
Works great
by RICHARD WHITESIDE on October 27, 2025
Verified Purchase
Was this review helpful? 0
View All 31 Reviews
Customer Questions
13 Questions