diff --git a/.github/workflows/python-publish-test.yml b/.github/workflows/python-publish-test.yml
index 05b40a8..368cb7b 100644
--- a/.github/workflows/python-publish-test.yml
+++ b/.github/workflows/python-publish-test.yml
@@ -7,7 +7,60 @@ permissions:
   contents: read
 
 jobs:
+
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ ubuntu-latest, windows-latest, macos-latest ]
+        python-version: [ "3.9", "3.10", "3.11", "3.12" ]
+
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v3
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Install dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install build-essential -y
+          
+          python -m pip install --upgrade pip
+          python -m pip install setuptools pytest cython
+
+      - name: Run unittest tests in pure python mode
+        run: |
+          if pytest tests --no-header --no-summary -v; then
+            echo "Pytest succeeded."
+          else
+            echo "Pytest failed, running without capture"
+            # Add your additional commands here
+            pytest tests --no-header --no-summary -v -s
+          fi
+
+      - name: Build cython modules
+        run: |
+          cd py_ballisticcalc_exts
+          python setup.py build_ext --inplace
+          cd ..
+
+      - name: Run unittest tests in binary mode
+        run: |
+          if pytest tests --no-header --no-summary -v; then
+            echo "Pytest succeeded."
+          else
+            echo "Pytest failed, running without capture"
+            # Add your additional commands here
+            pytest tests --no-header --no-summary -v -s
+          fi
+  
+  
+
   deploy:
+    needs: build
     runs-on: ${{ matrix.os }}
 
     strategy:
diff --git a/examples/ukrop_338lm_300gr_smk.py b/examples/ukrop_338lm_300gr_smk.py
new file mode 100644
index 0000000..0ceae89
--- /dev/null
+++ b/examples/ukrop_338lm_300gr_smk.py
@@ -0,0 +1,68 @@
+"""Example of library usage"""
+
+from py_ballisticcalc import *
+from py_ballisticcalc import Settings as Set
+
+# set global library settings
+Set.Units.velocity = Velocity.MPS
+Set.Units.adjustment = Unit.CM_PER_100M
+Set.Units.temperature = Temperature.Celsius
+# Set.Units.distance = Distance.Meter
+Set.Units.sight_height = Distance.Centimeter
+Set.Units.distance = Distance.Meter
+
+# Set.set_max_calc_step_size(Distance.Foot(1))
+Set.USE_POWDER_SENSITIVITY = True  # enable muzzle velocity correction my powder temperature
+
+# define params with default units
+weight, diameter = 300, 0.338
+# or define with specified units
+length = Distance.Inch(1.7)  # length = Distance(1.282, Distance.Inch)
+
+weapon = Weapon(twist=10, zero_distance=Distance.Meter(100),
+                sight_height=Unit.CENTIMETER(9))
+dm = DragModel(0.381, TableG7, weight, diameter)
+
+ammo = Ammo(
+    dm=dm, length=length,
+    mv=Unit.MPS(815),
+    powder_temp=Unit.CELSIUS(0))
+
+# ammo.calc_powder_sens(
+#     other_velocity=Unit.MPS(800),
+#     other_temperature=Unit.CELSIUS(-22)
+# )
+# print(ammo.temp_modifier)
+ammo.temp_modifier = 0.0123
+
+# zero_atmo = Atmo.icao(100)
+zero_atmo = Atmo(
+    altitude=Unit.METER(150),
+    pressure=Unit.MM_HG(745),
+    temperature=Unit.CELSIUS(-1),
+    humidity=78
+)
+
+# defining calculator instance
+calc = Calculator(weapon, ammo, zero_atmo)
+
+current_atmo = Atmo(
+    altitude=Unit.METER(150),
+    pressure=Unit.HP(992),
+    temperature=Unit.CELSIUS(23),
+    humidity=29
+)
+
+current_winds = [Wind()]
+shot = Shot(Distance.Meter(1000), atmo=current_atmo, winds=current_winds)
+
+shot_result = calc.fire(shot, Distance.Meter(100))
+
+from pprint import pprint
+fieldsss = TrajectoryData._fields
+
+for p in shot_result:
+
+    table = [{fieldsss[i]: it} for i, it in enumerate(p.formatted())]
+
+    pprint(table)